Automatic Transaxle - af33-5 - Introduction (2 of 2) Chevrolet Equinox I

Transmission Fluid Temperature (TFT) Sensor Specifications

Transmission Fluid Temperature (TFT) Sensor Specifications

Fastener Tightening Specifications

Fastener Tightening Specifications

Sealers, Adhesives, and Lubricants

Sealers, Adhesives, and Lubricants

Transmission General Specifications

Transmission General Specifications

Fluid Capacity Specifications

Fluid Capacity Specifications

Range Reference

Range Reference (AF23-5)

Shift Solenoid Valve State and Gear Ratio

Shift Solenoid Valve State and Gear Ratio

Shift Speed

Shift Speed (AF23-5

Transmission Range Switch Logic

Transmission Range Switch Logic

Line Pressure

Transmission in Reverse (R)

Transmission in Drive (D)

Component Resistance

Component Resistance

Automatic Transmission Schematic Icons

Automatic Transmission Schematic Icons Icon Icon Definition NOTE: The OBD II symbol is used on the circuit diagrams in order to alert the technician that the circuit is essential for proper OBD II emission control circuit operation. Any circuit which fails and causes the malfunction indicator lamp (MIL) to turn ON, or causes emissions-related component damage, is identified as an OBD II circuit. IMPORTANT: Twisted-pair wires provide an effective "shield" that helps protect sensitive electronic components from electrical interference. If the wires were covered with shielding, install new shielding. In order to prevent electrical interference from degrading the performance of the connected components, you must maintain the proper specification when making any repairs to the twisted-pair wires shown : The wires must be twisted a minimum of 10 turns per 31 cm (12 in) as measured anywhere along the length of the wires The outside diameter of the twisted wires must not exceed 6.0 mm

Scheme 7

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Scheme 33

Scheme 34

C100 to Wiring Harness Side to Transmission Side

Automatic Transmission Inline Harness Connector End

Scheme 35

Scheme 36

Automatic Transmission Inline Harness Connector End View

C100 to Wiring Harness Side to Transmission Side

Scheme 37

Automatic Transmission Internal Connector End Views

1-2, 2-3, Reverse Shift Solenoid (S3)

2-3, 3-4 Shift Solenoid (S2)

Automatic Transmission Internal Connector End Views

2-3, 3-4 Shift Solenoid (S2)

3-4, 4-5 Shift Solenoid (S4)

Automatic Transmission Internal Connector End Views

3-4, 4-5 Shift Solenoid (S4)

Scheme 38

Automatic Transmission Internal Connector End Views

Automatic Transmission Fluid Temperature (TFT) Sensor

Scheme 39

Automatic Transmission Internal Connector End Views

Line Pressure Control Solenoid (SLT)

Reverse, 1st Shift Solenoid (S1)

Automatic Transmission Internal Connector End Views

Reverse, 1st Shift Solenoid (S1)

Reverse Shift Valve Solenoid (S5)

Automatic Transmission Internal Connector End Views

Reverse Shift Valve Solenoid (S5)

Shift Pressure Control Solenoid (SLS)

Automatic Transmission Internal Connector End Views

Shift Pressure Control Solenoid (SLS)

Torque Converter Clutch (TCC) Lock Up Pressure Control Solenoid (SLU)

Automatic Transmission Internal Connector End Views

Torque Converter Clutch (TCC) Lock Up Pressure Control Solenoid (SLU)

Scheme 40

Automatic Transmission Related Connector End Views

Input Shaft Speed (ISS) Sensor Connector, Wiring Harness Side

Output Shaft Speed (OSS) Sensor, Wiring Harness Side

Automatic Transmission Related Connector End Views

Output Shaft Speed (OSS) Sensor, Wiring Harness Side

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Automatic Transmission Related Connector End Views

Park/Neutral Position Switch Assembly, Wiring Harness Side

Scheme 42

Automatic Transmission Related Connector End Views

Stop Lamp Switch - Lower

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Automatic Transmission Related Connector End Views

Stop Lamp Switch - Upper

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Automatic Transmission Related Connector End Views

Transmission Control Module C1

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Automatic Transmission Related Connector End Views

Transmission Control Module C2

DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

Removal Procedure

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/equinox/i-2004-2009/remont/hoistjack/#general-information) in General Information.
2. Remove the drain plug and drain fluid. Allow at least 5 minutes for the fluid to drain completely.
3. Remove the gasket from the drain plug and discard.

Installation Procedure

1. Install the new gasket on the drain plug.
2. Install the drain plug. Tighten: Tighten the drain plug to 40 N.m (30 lb ft).
3. Make sure vehicle is level.
4. Remove the fluid level indicator located behind the front transaxle mount. Refer to «Fluid Level Indicator Replacement»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2) .
5. Add approximately 3.1 L(3.3 Qt) of GM T-IV fluid to the transaxle, using the fluid level indicator location.
6. Start engine and operate vehicle until transaxle fluid temperature reaches 60°-70°C (140°-158°F).
7. Apply parking brake.
8. Depress brake pedal and move shift lever slowly through all gear ranges from park (P) to low (L), pausing for about 3 seconds in each range. Return shift lever to park (P) range at idle condition.
9. Pull level gauge out again and check if fluid level is within the HOT range.
10. If fluid is not within the correct level, adjust accordingly: If fluid is below the HOT range, add enough to bring it up to the correct level. If fluid is above HOT range, drain excess fluid.
11. Install the fluid level indicator. Refer to «Fluid Level Indicator Replacement»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2) .

1. Apply the parking brake.
2. Rotate the key to the RUN position, however do NOT start the vehicle.
3. Move the shift control lever rearward to one of the low gear positions.
4. Carefully insert a small flat bladed tool between the trim ring (2) and the shift knob (1). Apply careful downward pressure to the shift knob trim ring to separate the trim ring from the shift knob. The trim ring will drop down approximately 13.0mm (0.5 in) exposing the shift knob retaining screw.
5. Loosen the shift control knob screw (1) approximately 4-5 turns. It is not necessary to fully remove the screw from the shift control knob.
6. Remove the shift control knob (2) from the shift control lever (1).

1. Install the shift control knob (2) to the shift control lever (1).
2. Install the control knob screw (1) if previously removed. Tighten: Tighten the screw to 1.5 N.m (13 lb in).
3. Lift the shift control knob trim ring (1) up to the shift control knob until a click sound is heard indicating the trim ring is secured to the shift knob.
4. Check for proper operation of the shift knob button through all gear ranges.
5. Place the shift control lever in the PARK position.
6. Rotate the key to the off position.

1. Remove the center trim bezel. Refer to «Trim Bezel Replacement - Center»(/chevrolet/equinox/i-2004-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.
2. Remove the screws holding the shift indicator to the center console trim bezel and disconnect the electrical connector.
3. Remove the shift indicator from the center trim bezel.

1. Align the shift indicator with the center trim bezel and fasten with the screws. Tighten: Tighten the screws to 2 N.m (18 lb in).
2. Connect the electrical connection to the center trim bezel.
3. Attach the center trim bezel to the center stack. Verify proper operation. Refer to «Trim Bezel Replacement - Center»(/chevrolet/equinox/i-2004-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.

Tools Required

J 36346 Fascia Retainer Remover. See Special Tools .

1. Disable the SIR system. Refer to «SIR Disabling and Enabling Zone 8»(/chevrolet/equinox/i-2004-2009/remont/airbag/#supplemental-inflatable-restraint-system) in SIR.
2. Remove the console. Refer to «Console Replacement»(/chevrolet/equinox/i-2004-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.
3. Using the J 36346 , disconnect the shift control cable from the shift control range select lever pin. See «Special Tools»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__special-tools) .
4. Squeeze the tabs on the shift control cable retainer clip and remove the cable from the shift control.
5. Squeeze the tabs on the park lock cable clip and pull upward to remove the cable from the shift control.
6. Disconnect the park lock cable from the shift control park lock lever.
7. Disconnect the shift control electrical connector.
8. Remove the nuts from the shift control.
9. Remove the shift control from the shift control mounting bracket.

1. Install the shift control to the shift control mounting bracket.
2. Install the shift control nuts. Tighten: Tighten the nuts to 25 N.m (18 lb ft).
3. Connect the shift control electrical connector.
4. Install the park lock cable onto the shift control.
5. Install the park lock cable end terminal onto the park lock lever by aligning the cable fitting to the park lock lever pin and pushing forward. When installing, be sure not to install the cable end fitting on an angle or push down on the cable portion as this may cause cable to misadjust.
6. If the park lock cable becomes misadjusted. Refer to «Park Lock Cable Replacement»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2) for the park lock cable adjustment procedure.
7. Install the shift control cable onto the shift control.
8. Connect the shift control cable onto the shift control range select lever pin.
9. Install the console. Refer to «Console Replacement»(/chevrolet/equinox/i-2004-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.
10. Enable SIR system. Refer to «SIR Disabling and Enabling Zone 8»(/chevrolet/equinox/i-2004-2009/remont/airbag/#supplemental-inflatable-restraint-system) in SIR.

J 36346 Fascia Retainer Remover. See Special Tools .

Disassembling Cable

1. Set the parking brake.
2. Ensure that the shift control range select lever is in the park (P) position.
3. Remove the shift control cable retainer (2) from the cowl stud (1) near the brake master cylinder.
4. Pull back the spring loaded cover (2) to expose the cable adjustment lock (3).
5. Lift the cable adjustment lock (3) up to unlock both halves of the shift cable (1, 4).
6. Rotate the shift cable to expose the retaining clip (5). It may be necessary to pull the transaxle end of the shift cable (4) out of the shift control end of the shift cable (1) to fully expose the retaining clip (5).
7. Remove the retaining clip (2) from the shift control cable (3).
8. Separate the shift control end of the cable (1) from the transaxle end of the cable (2).

Scheme 46

Refer to the following steps to remove the shift control end (2) of the shift control cable.

1. Remove the console. Refer to «Console Replacement»(/chevrolet/equinox/i-2004-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages and Console.
2. Ensure that the shift control range select lever is in the park (P) position.
3. Using the J 36346 , disconnect the shift control cable from the shift control range select lever pin. See «Special Tools»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__special-tools) .
4. Depress the shift control cable retainer clip tabs and remove the cable from the shift control.
5. Remove the shift control cable grommet from the cowl.
6. Remove the shift control cable retainer (1) from the cowl stud (2) near the generator.
7. Remove the shift control cable retaining clips (2) from the cowl (1).
8. Note the shift control cable routing and remove the shift control cable from the vehicle.

Cable Removal - Transaxle End

Refer to the following steps to remove the transaxle end (1) of the shift control cable.

1. Using the J 36346 , disconnect the shift control cable (2) from the transaxle range switch lever (3). See «Special Tools»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__special-tools) .
2. Depress the shift control cable retainer clip tabs and remove the shift control cable (2) from the shift control cable bracket (1).
3. Note the shift control cable routing and remove the shift control cable from the vehicle.

Cable Installation - Transaxle End

Refer to the following steps to install the transaxle end (1) of the shift control cable.

1. Install the shift control cable (2) to the shift control cable bracket (1). Ensure the shift control cable retaining tabs fully engage the shift control cable bracket.
2. Connect the shift control cable (2) to the transaxle range switch lever (3).

Cable Installation - Shift Control End

Refer to the following steps to remove the shift control end (2) of the shift control cable.

1. Secure the shift control cable grommet by pressing the cable into the pass-thru hole in the cowl.
2. Ensure the shift control range select lever is in the park (P) position.
3. Install the shift control cable to the shift control.
4. Install the shift control cable onto the shift control range select lever pin.
5. Install the console. Refer to «Console Replacement»(/chevrolet/equinox/i-2004-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages and Console.
6. Attach the shift control cable retainer (1) to the cowl stud (2) near the generator.
7. Install the shift control cable retaining clips (2) to the cowl (1).

Assembling Cable

1. Install the cable retaining clip (2).
2. Push the transaxle end of the shift control cable (4) into the shift control end of the shift control cable (1) until the cable retaining clip (5) is fully locked into the shift control cable groove (3).
3. Ensure that the shift control lever and the transaxle range select lever are both in the park (P) position.
4. Ensure the transaxle cable end (4) is not being held and that the spring is allowed to tension the cable.
5. Depress the cable adjustment lock (3) in order to lock both halves of the shift cable (1, 4).
6. Release the spring loaded cover (2) allowing it to cover the cable adjustment lock.
7. Install the shift control cable retainer (2) to the cowl stud (1) near the brake master cylinder.
8. Adjust the shift control cable. Refer to «Shift Control Cable Adjustment»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2) .

J 36346 Fascia Retainer Remover. See Special Tools .

Adjustment Procedure

1. Apply the parking brake and ensure the vehicle is not running.
2. Ensure that the shift control assembly is in the park (P) position.
3. Pull back the white plastic cover (1) on the center connector.
4. Pull up on the center tabs of the lock button (2).
5. Release the shift cable end (2) and allow the blue spring to tension/adjust the shift cable system.
6. Pull the white cover (3) on the shift cable end (1) back.
7. Push the natural colored lock button (2) down to engage the locking teeth on the shift cable end (1).
8. Release the white cover (1).
9. Verify the white cover (1) conceals the natural colored lock (2).
10. If the white cover (1) does not conceal the natural colored lock (2), the shift cable must be readjusted.
11. Test the transmission for proper shift operation.
12. If all of the gear positions cannot be achieved, the shift cable must be readjusted.

J 36346 Fascia Retainer Remover. See Special Tools .

1. Remove the battery tray. Refer to «Battery Tray Replacement»(/chevrolet/equinox/i-2004-2009/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
2. Using the J 36346 , disconnect the shift control cable from the transaxle range switch lever. See «Special Tools»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__special-tools) .
3. Depress the shift control cable retainer clip tabs and remove the cable from the shift control cable bracket.
4. Remove the shift control cable bracket bolts.
5. Remove the shift control cable bracket.

1. Install the transaxle shift control bracket.
2. Install the transaxle shift control bracket. Tighten: Tighten the bolts to 25 N.m (18 lb ft).
3. Secure the shift control cable to the bracket. An audible snap will be heard when properly installed.
4. With the transaxle range switch lever in neutral (N), attach the shift control cable end fitting onto the ball stud of the transaxle range switch lever. An audible snap will be heard when the shift control cable is properly installed.
5. Install the battery tray. Refer to «Battery Tray Replacement»(/chevrolet/equinox/i-2004-2009/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.

1. Disable the SIR system. Refer to «SIR Disabling and Enabling Zone 8»(/chevrolet/equinox/i-2004-2009/remont/airbag/#supplemental-inflatable-restraint-system) in SIR.
2. Remove the console. Refer to «Console Replacement»(/chevrolet/equinox/i-2004-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages and Console.
3. Remove the lock cylinder bezel from the steering column shroud by carefully prying with a thin bladed screwdriver.
4. Remove the shroud fasteners and remove the steering column upper and lower shroud panels.
5. Make sure the key is in the OFF position.
6. Squeeze the tabs on the park lock cable clip and pull upward to remove the cable from the shift control.
7. Disconnect the park lock cable from the shift control park lock lever.
8. Disengage the retaining tabs and remove the park lock cable from the ignition module.
9. Note the park lock cable routing while removing the park lock cable from the vehicle.
10. Using a screwdriver, push on the black tab to release the end fitting. Discard the end fitting.

1. Install a new end fitting on the park lock cable.
2. Install the park lock cable onto the ignition module.
3. Install the park lock cable onto the shift control.
4. Install the park lock cable end terminal onto the park lock lever by aligning the cable fitting to the park lock lever pin and pushing forward. When installing, be sure not to install the cable end fitting on an angle or push down on the cable portion as this may cause cable to misadjust.
5. With the cable adjuster in the unlocked position, verify the shift control is in the park (P) position. Lock the adjuster piece into place by pushing in on the tab, then check the cable adjustment as follows: Set the parking brake. With the ignition key removed from ignition lock cylinder and control shift lever in the park (P) position, depress the control shift lever button and attempt to move control shift lever out of park (P) position. If control shift lever can be shifted out of park (P) position, perform step 5 over again ensuring that the cable adjuster lock is operating properly. If control shift lever cannot be shifted out of park (P) position, proceed to next step. Insert the ignition key into the ignition lock cylinder assembly and turn to RUN position. Depress the brake pedal and depress the control shift lever button and move control shift lever out of park (P) position. Release the brake pedal. With the control shift lever out of the park (P) position, attempt to turn ignition to LOCK position. Ensure the ignition key is pushed inward toward the steering column when it is rotated toward LOCK position. If ignition key can be turned to LOCK position with control shift lever out of park (P) position, return to the beginning of step 5 and check the park lock cable adjustment. If the ignition key cannot be turned to LOCK position with the control shift lever out of the park (P) position, park lock cable is properly adjusted. Proceed to next step. Depress the control shift lever button. Move control shift lever to park (P) position. Turn the ignition key to ON position and then to OFF position. Ensure ignition key is removable. If ignition key can be removed from ignition lock cylinder assembly, proceed to next step. If ignition key cannot be removed from ignition lock assembly, return to the beginning of step 5 and check the park lock cable adjustment. Turn the ignition key to LOCK position. Remove the ignition key from the ignition lock cylinder assembly.
6. Install the shroud fasteners and install the steering column upper and lower shroud panels.
7. Install the lock cylinder bezel onto the steering column shroud.
8. Install the console. Refer to «Console Replacement»(/chevrolet/equinox/i-2004-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages and Console.
9. Enable the SIR system. Refer to «SIR Disabling and Enabling Zone 8»(/chevrolet/equinox/i-2004-2009/remont/airbag/#supplemental-inflatable-restraint-system) in SIR.

J 36346 Fascia Retainer Remover. See Special Tools .

1. Remove the battery tray. Refer to «Battery Tray Replacement»(/chevrolet/equinox/i-2004-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Using the Fascia Retainer Remover J 36346 , disconnect the shift control cable from the transaxle range switch lever. See «Special Tools»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__special-tools) .
3. Remove the transaxle range switch lever nut and lever.

1. Install the transaxle range switch lever and lever nut. Tighten: Tighten the nut to 16 N.m (12 lb ft).
2. Install the shift control cable end fitting onto the ball stud of the transaxle range switch lever. An audible snap will be heard when properly installed.
3. Install the battery tray. Refer to «Battery Tray Replacement»(/chevrolet/equinox/i-2004-2009/remont/charging-system/#battery-charging-system-and-starting-system) .

J 45404 Transmission Indicator Alignment Tool. See Special Tools .

1. Remove the battery tray. Refer to «Battery Tray Replacement»(/chevrolet/equinox/i-2004-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
2. Apply the parking brake and place control shift lever in neutral (N).
3. Remove the transaxle range switch lever. Refer to «Transaxle Range Switch Lever Replacement»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2) .
4. Disconnect the electrical connectors (3, 5) from the transaxle range switch.
5. Using a screwdriver, bend the lockwasher tabs down away from the manual shaft nut.
6. Remove the nut, lock tab washer, and flat washer.
7. Remove the transaxle range switch bolt (2), stud (1), and flat washers.
8. Remove the transaxle range switch (3).

1. Install the transaxle range switch (3) to the manual shaft lever.
2. Install the washer stud (1) and the bolt (2). Hand tighten ONLY at this time.
3. Install the flat washer, lock tab washer, and nut. Tighten: Tighten the nut to 7 N.m (62 lb in).
4. Ensure the manual shaft is in neutral (N) position.
5. Bend the lock washer tabs up to secure the nut.
6. Install the J 45404 to the manual shaft and rotate the transaxle range switch until the neutral base line on the switch lines up with the indicator line on the J 45404 . See «Special Tools»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__special-tools) .
7. Tighten the transaxle range switch bolt and stud. Tighten: Tighten the bolt and stud to 25 N.m (18 lb ft).
8. Remove the J 45404 from the manual shaft. See «Special Tools»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__special-tools) .
9. Connect the electrical connectors (3, 5) to the transaxle range switch.
10. Install the transaxle range switch lever. Refer to «Transaxle Range Switch Lever Replacement»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2) .
11. Install the battery tray. Refer to «Battery Tray Replacement»(/chevrolet/equinox/i-2004-2009/remont/charging-system/#battery-charging-system-and-starting-system) .
12. After installing and adjusting the switch, verify the engine only starts in park (P) or neutral (N). If the engine starts in any other position, readjust the switch. Refer to «Transaxle Range Switch Adjustment»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__transaxle-range-switch-adjustment) .

Transaxle Range Switch Adjustment

Tools Required

1. J 36346 Fascia Retainer Remover. See «Special Tools»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__special-tools) .
2. J 45404 Transmission Indicator Alignment Tool. See «Special Tools»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__special-tools) .

1. Remove the battery tray. Refer to «Battery Tray Replacement»(/chevrolet/equinox/i-2004-2009/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
2. Shift the transaxle into neutral (N) position.
3. Using the Fascia Retainer Remover J 36346 , remove the shift control cable from the transaxle range switch lever. See «Special Tools»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__special-tools) .
4. Loosen the transaxle range switch bolt (2) and stud (1).
5. Install the J 45404 to the manual shaft and rotate the transaxle range switch until the neutral base line on the switch lines up with the indicator line on the J 45404 . See «Special Tools»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__special-tools) .
6. Tighten the transaxle range switch bolt and stud. Tighten: Tighten the bolt and stud to 25 N.m (18 lb ft).
7. Remove the J 45404 from the manual shaft. See «Special Tools»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__special-tools) .
8. Install the shift control cable to the transaxle range switch lever.
9. Install the battery tray. Refer to «Battery Tray Replacement»(/chevrolet/equinox/i-2004-2009/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
10. After adjusting the transaxle range switch, verify the engine only starts in park (P) or neutral (N). If the engine starts in any other position, readjust the switch.

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/chevrolet/equinox/i-2004-2009/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
2. Remove the TCM from TCM bracket.
3. Disconnect the transaxle control module (TCM) electrical connectors (1) from the TCM (2).

1. Connect the TCM electrical connector (1) to the TCM (2).
2. Install the TCM to the TCM bracket.
3. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/chevrolet/equinox/i-2004-2009/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
4. Reprogram the TCM with the correct calibration. Refer to «Transmission Control Module Programming and Setup»(/chevrolet/equinox/i-2004-2009/remont/communication-devices/#programming-and-setup-all-systems__transmission-control-module-programming-and-setup) in Programming and Setup.
5. Perform the transmission adaptive learn procedure. Refer to «Transmission Adaptive Learn Procedure»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#how-to-diagnosis-troubleshooting-the-automatic-transaxle-af33-5-service__transmission-adaptive-learn-procedure) .

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/equinox/i-2004-2009/remont/hoistjack/#general-information) in General Information.
2. Remove the transaxle brace to engine oil pan bolts (2).
3. Remove the transaxle brace to transaxle bolt (1).
4. Remove the transaxle brace (3).

1. Install the transaxle brace (3).
2. Install the transaxle brace bolts (1, 2). Tighten: Tighten the bolts to 50 N.m (37 lb ft).
3. Lower the vehicle.

1. Clean any dirt or debris away from the transaxle fluid plug/level indicator area.
2. Remove the transaxle fluid level indicator bolt from the transaxle.
3. Remove the transaxle fluid level indicator from the transaxle.
4. Wipe away any transaxle fluid from the fluid level indicator.

1. Install the transaxle fluid level indicator onto the transaxle.
2. Install the transaxle fluid level indicator bolt onto the transaxle. Tighten: Tighten the bolt to 10 N.m (89 lb in).

1. Remove the battery tray. Refer to «Battery Tray Replacement»(/chevrolet/equinox/i-2004-2009/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
2. Disconnect the wiring harness (4) from the input speed sensor.
3. Remove the input speed sensor bolt.
4. Remove the input speed sensor.
5. Remove the input speed sensor O-ring. Discard the O-ring.

1. Apply GM T-IV automatic transaxle fluid GM P/N 88900925 to the new input speed sensor O-ring.
2. Install the new input speed sensor O-ring onto the input speed sensor.
3. Install the input speed sensor to the transaxle.
4. Install the input speed sensor bolt. Tighten: Tighten the bolt to 6 N.m (53 lb in).
5. Connect the wiring harness (4) to the input speed sensor.
6. Install the battery tray. Refer to «Battery Tray Replacement»(/chevrolet/equinox/i-2004-2009/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.

1. Disconnect the wiring harness (2) from the output shaft speed sensor.
2. Remove the output speed sensor bolt (3).
3. Remove the output shaft speed sensor (2) and the O-ring (1).

1. Apply GM T-IV automatic transaxle fluid GM P/N 88900925 to the new output speed sensor O-ring (1).
2. Install the new output speed sensor O-ring (1) onto the output speed sensor (2).
3. Install the output speed sensor (2) into the transmission case assembly.
4. Install the output speed sensor bolt (3). Tighten: Tighten the bolt to 6 N.m (53 lb in).
5. Connect the wiring harness (2) to the output shaft speed sensor.

1. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/equinox/i-2004-2009/remont/hoistjack/#general-information) in General Information.
2. Remove the left front wheel and tire assembly. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/equinox/i-2004-2009/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
3. Remove the left splash shield. Refer to «Splash Shield Replacement - Engine»(/chevrolet/equinox/i-2004-2009/remont/exterior-body-panels/#body-front-end) in Body Front End.
4. Remove the front engine mount. Refer to «Engine Mount Replacement - Front»(ref-239708-S34250652082006080100000) in Engine Mechanical - 3.4L.
5. Remove the transaxle oil cooler lines and seals from the transaxle. Refer to «Oil Cooler Pipe Seals Replacement»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__oil-cooler-pipe-seals-replacement)
6. Remove the 9 TORX bolts (2) from the control valve body cover (1).
7. Remove control valve body cover.

1. Clean any gasket material from the control valve body cover and inspect the gasket mounting surface.
2. Install a 3 mm (0.125 in) bead of RTV sealer GM P/N 89020326 (Canadian P/N 89021188) onto the control valve body cover.
3. Install the control valve body cover (1) onto the transaxle case.
4. Install the control valve body cover bolts (2) hand tight.
5. Tighten the control valve body cover bolts in the sequence shown. Tighten: Tighten the bolts to 13 N.m (115 lb in).
6. Install the transaxle oil cooler lines and seals to the transaxle. Refer to «Oil Cooler Pipe Seals Replacement»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__oil-cooler-pipe-seals-replacement) .
7. Install the front engine mount. Refer to «Engine Mount Replacement - Front»(ref-239708-S34250652082006080100000) in Engine Mechanical - 3.4L.
8. Install the left splash shield. Refer to «Splash Shield Replacement - Engine»(/chevrolet/equinox/i-2004-2009/remont/exterior-body-panels/#body-front-end) in Body Front End.
9. Install the left front wheel and the tire assembly. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/equinox/i-2004-2009/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
10. Lower the vehicle.
11. Check the transaxle fluid level. Refer to «Transmission Fluid Checking Procedure»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#how-to-diagnosis-troubleshooting-the-automatic-transaxle-af33-5-service) .

1. Remove the control valve body cover. Refer to «Control Valve Body Cover Replacement»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2) .
2. Disconnect the wiring harness connectors (1-8).
3. Remove the fluid temperature sensor bolt (31).
4. Remove the fluid temperature sensor clamp (49).
5. Remove the fluid temperature sensor (36) and the O-ring (32) from the control valve body.
6. Remove the wiring harness (33) from the automatic transaxle wiring harness clip.
7. With a twisting motion remove the complete wiring harness assembly.
8. Remove the 2 control valve body bolts/screws (31), control valve body fluid passage cover (37) and gasket (38).
9. Remove the 6 control valve body mounting bolts/screws (1-6).
10. While holding the control valve body assembly, disconnect the manual shift detent lever assembly (710) from the manual valve link (336).
11. Move the detent lever assembly clockwise for ease of removing the manual valve.
12. Remove the control valve body assembly (39).
13. Remove the 2 transaxle case fluid passage seals (86).

1. Install 2 new transaxle case fluid passage seals (86) into the transaxle case fluid ports.
2. While holding the control valve body assembly (39), connect the manual valve link (336) to the manual shift detent lever assembly (710).
3. Install the 6 control valve body assembly to transaxle case bolts and hand tighten.
4. Tighten the control valve body assembly-to-transaxle case bolts in sequence. Tighten: Tighten the bolts to 10 N.m (89 lb in).
5. Install a new control valve body fluid passage cover gasket (38).
6. Install the control valve body fluid passage cover (37).
7. Install the 2 control valve body bolts (31). Tighten: Tighten the bolt to 10 N.m (89 lb in).
8. Apply GM T-IV automatic transaxle fluid GM P/N 88900925 to a new transaxle wiring connector O-ring seal (46).
9. Install a new transaxle wiring connector O-ring seal (46) onto the transaxle wiring harness assembly (33).
10. Install the transaxle wiring harness assembly (33) into the transaxle case through the wiring harness bore.
11. Apply GM T-IV automatic transaxle fluid GM P/N 88900925 to a new transaxle fluid temperature sensor O-ring seal (32).
12. Install a new transaxle fluid temperature sensor O-ring seal (32) into the groove of the transaxle fluid temperature sensor (36).
13. Install the transaxle fluid temperature sensor (36) into the front control valve body fluid temperature sensor bore.
14. Install the transaxle fluid temperature sensor clip (49).
15. Install the fluid temperature sensor bolt (31). Tighten: Tighten the bolt to 10 N.m (89 lb in).
16. Connect the 8 solenoid wire connectors as follows: 1 blue 2 black 3 green 4 black 5 blue 6 gray 7 brown 8 black
17. Install the control valve body cover. Refer to «Control Valve Body Cover Replacement»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2) .
18. Perform the transmission adaptive learn procedure. Refer to «Transmission Adaptive Learn Procedure»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#how-to-diagnosis-troubleshooting-the-automatic-transaxle-af33-5-service__transmission-adaptive-learn-procedure) .

1. Position the vehicle on a hoist.
2. Place a drain pan or suitable container under the vehicle.
3. Disconnect the transaxle oil cooler lines from the radiator.
4. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/equinox/i-2004-2009/remont/hoistjack/#general-information) .
5. Disengage the transaxle cooler lines from the fan shroud.
6. Remove the transaxle cooler line assembly nut (2) from the transaxle.
7. Remove the transaxle cooler lines (1) from the vehicle.
8. Replace the transaxle oil cooler pipe seals. Refer to the «Oil Cooler Pipe Seals Replacement»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__oil-cooler-pipe-seals-replacement) .

1. Install the transaxle oil cooler line assembly (1) to the transaxle.
2. Install the transaxle oil cooler line assembly nut (2). Tighten: Tighten the transaxle oil cooler lines to 7 N.m (62 lb in).
3. Lower the vehicle.
4. Engage the transaxle oil cooler lines with the fan shroud by snapping in place.
5. Connect the transaxle oil cooler lines to the radiator. Tighten: Tighten the transaxle cooler line fittings to 16 N.m (12 lb ft).
6. Add fluid to the transaxle. Refer to the «Transmission Fluid Checking Procedure»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#how-to-diagnosis-troubleshooting-the-automatic-transaxle-af33-5-service) .
7. Start the engine a check for leaks.

Oil Cooler Pipe Seals Replacement

Tools Required

1. J 41239-1 Cooler Line Seal Installer. See «Special Tools»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__special-tools) .
2. J 45201 Cooler Line Seal Remover. See «Special Tools»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__special-tools) .

1. Raise Vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/equinox/i-2004-2009/remont/hoistjack/#general-information) in General Information.
2. Place a drain pan or suitable container under the vehicle.
3. Remove the transaxle oil cooler line assembly nut from the transaxle.
4. Disconnect the transaxle oil cooler lines from the vehicle.
5. Insert the collet piece (2) of the J 45201 into the cooler line seal. See «Special Tools»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__special-tools) .
6. Insert the forcing screw piece (1) of the J 45201 into the collet (2). See «Special Tools»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__special-tools) .
7. Tighten the forcing screw (1) until snug.
8. Thread the collar piece (1) of the J 45201 onto the collet (3) until snug. See «Special Tools»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__special-tools) .
9. Turn the collar clockwise in order to remove the cooler line seal (87).
10. Discard the seal (87).
11. Clean the case bores for the cooler line seals.

1. Insert a new transaxle cooler line seal into the case bore.
2. Remove the nub from the J 41239-1 . See «Special Tools»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__special-tools) .
3. Install the nub of the J 41239-1 on the transaxle cooler line seal. See «Special Tools»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__special-tools) .
4. Tap the new transaxle cooler line seal into the case bore.
5. Install the transaxle oil cooler line assembly to the transaxle.
6. Install the transaxle oil cooler line assembly nut. Tighten: Tighten the transaxle cooler line retaining nut to 7 N.m (62 lb in).
7. Lower the vehicle.
8. Add fluid to the transaxle. Refer to «Transmission Fluid Checking Procedure»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#how-to-diagnosis-troubleshooting-the-automatic-transaxle-af33-5-service) procedure located in this service manual.
9. Start the engine and check for leaks.

Drive Axle Shaft Seal Replacement (Right)

Tools Required

1. J 45000 Seal Remover. See «Special Tools»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__special-tools) .
2. J 45187 Differential Output Shaft Oil Seal Installer. See «Special Tools»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__special-tools) .

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/equinox/i-2004-2009/remont/hoistjack/#general-information) in General Information.
2. Place a drain pan under the transaxle to catch any spilled transaxle fluid.
3. Remove the right front wheel drive shaft. Refer to «Wheel Drive Shaft Replacement - Front»(/chevrolet/equinox/i-2004-2009/remont/axle-shafts/#wheel-drive-shafts__wheel-drive-shaft-replacement-front) in Wheel Drive Shafts.
4. Vehicles equipped with all wheel drive (AWD), remove the transfer case. Refer to «Transfer Case Replacement»(/chevrolet/equinox/i-2004-2009/remont/transfer-case/#transfer-case-nvg-900-service-troubleshooting__transfer-case-replacement) in Transfer Case - NVG 900.
5. If equipped with an axle seal dust cover, discard it and do not replace it.
6. Using the J 45000 remove the right drive axle seal from the transaxle. See «Special Tools»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__special-tools) .
7. Clean the seal bore in the transaxle housing.

1. Using the J 45187 , install the right drive axle seal onto the transaxle. See «Special Tools»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__special-tools) .
2. Vehicles equipped with AWD, install the transfer case. Refer to «Transfer Case Replacement»(/chevrolet/equinox/i-2004-2009/remont/transfer-case/#transfer-case-nvg-900-service-troubleshooting__transfer-case-replacement) in Transfer Case - NVG 900.
3. Install the right front wheel drive shaft. Refer to «Wheel Drive Shaft Replacement - Front»(/chevrolet/equinox/i-2004-2009/remont/axle-shafts/#wheel-drive-shafts__wheel-drive-shaft-replacement-front) in Wheel Drive Shafts.
4. Lower the vehicle.
5. Inspect the transaxle fluid level. Refer to «Automatic Transmission Controls Schematics»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2) .

Drive Axle Shaft Seal Replacement (Left)

Tools Required

1. J 44809 Output Shaft Seal Installer
2. J 45000 Seal Remover. See «Special Tools»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__special-tools) .

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/equinox/i-2004-2009/remont/hoistjack/#general-information) in General Information.
2. Place a drain pan under the transaxle to catch any spilled transaxle fluid.
3. Remove the left front axle shaft. Refer to «Wheel Drive Shaft Replacement - Front»(/chevrolet/equinox/i-2004-2009/remont/axle-shafts/#wheel-drive-shafts__wheel-drive-shaft-replacement-front) in Wheel Drive Shafts.
4. Using the J 45000 , remove the axle seal from the transaxle and discard. See «Special Tools»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__special-tools) .
5. Clean the seal bore in the transaxle housing.

1. Using the J 44809 , install the left axle seal into the transaxle.
2. Install the left front axle shaft. Refer to «Wheel Drive Shaft Replacement - Front»(/chevrolet/equinox/i-2004-2009/remont/axle-shafts/#wheel-drive-shafts__wheel-drive-shaft-replacement-front) in Wheel Drive Shafts.
3. Lower the vehicle.
4. Inspect the transaxle fluid level. Refer to «Automatic Transmission Controls Schematics»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2) .

Transaxle Replacement

Tools Required

1. J 6125-1B Slide Hammer with Adapter
2. J 38868 Output Shaft Assembly Remover and Installer

1. Remove the battery tray. Refer to «Battery Tray Replacement»(/chevrolet/equinox/i-2004-2009/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
2. Remove the shift control cable bracket. Refer to «Shift Control Cable Bracket Replacement»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2) .
3. Disconnect the electrical connector (4) from the input speed sensor.
4. Disconnect the electrical connectors (3, 5) from the transaxle range switch.
5. Remove the wire harness (2) from the transaxle range switch.
6. Remove the nut (6) securing the battery negative cable and wire harness ground to the transaxle stud.
7. Remove the battery negative cable and wire harness ground (1) from the transaxle stud.
8. Disconnect the electrical connector (2) from the output speed sensor.
9. Remove the nut and fuel line retaining clip (1) from the transaxle.
10. Disconnect the transaxle vent tube.
11. Secure the wire harness, vent hose, and shift cable up away from the transaxle.
12. Remove the upper 4 transaxle-to-engine bolts.
13. Tie the radiator, air conditioning condenser and fan module assembly to the upper radiator support to keep the assembly with the vehicle when the frame and drivetrain are removed.
14. Install the engine support fixture. Refer to «Engine Support Fixture»(ref-239708-S10770509852006080100000) in Engine Mechanical - 3.4L.
15. Remove the left hand transaxle mount-to-transaxle bolts.
16. Remove the left hand transaxle mount-to-side rail bolts.
17. Remove the left hand transaxle mount from the vehicle.
18. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/equinox/i-2004-2009/remont/hoistjack/#general-information) in General Information.
19. Remove both front wheels. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/equinox/i-2004-2009/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
20. Remove the left and right side engine splash shields. Refer to «Splash Shield Replacement - Engine»(/chevrolet/equinox/i-2004-2009/remont/exterior-body-panels/#body-front-end) in Body Front End.
21. Remove the steering intermediate shaft pinch bolt and discard the bolt.
22. Disconnect the steering intermediate shaft from the steering gear.
23. Remove the right and left outer tie rod ends from the steering knuckles. Refer to «Rack and Pinion Outer Tie Rod End Replacement»(/chevrolet/equinox/i-2004-2009/remont/manual-power-steering/#power-steering-system) in Power Steering System.
24. Remove the right and left stabilizer shaft links from the stabilizer shaft. Refer to «Stabilizer Shaft Link Replacement»(/chevrolet/equinox/i-2004-2009/remont/suspension-front/#front-suspension-system) in Front Suspension.
25. Remove the right and left lower ball joints from the steering knuckles. Refer to «Lower Control Arm Replacement»(/chevrolet/equinox/i-2004-2009/remont/suspension-front/#front-suspension-system__lower-control-arm-replacement) in Front Suspension.
26. Remove the front bumper fascia air deflector. Refer to «Air Deflector Replacement - Front Bumper Fascia»(/chevrolet/equinox/i-2004-2009/remont/exterior-body-panels/#bumper-system) in Bumpers.
27. Drain the transaxle fluid. Refer to «Transaxle Fluid Replacement»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2) .
28. Remove the transaxle oil cooler lines and seals from the transaxle. Refer to «Oil Cooler Pipe Seals Replacement»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__oil-cooler-pipe-seals-replacement) .
29. Remove the engine-to-transaxle brace bolts (1, 2) and brace (3).
30. Remove the starter motor. Refer to «Starter Motor Replacement»(/chevrolet/equinox/i-2004-2009/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
31. Turn the crankshaft balancer bolt clockwise to gain access to the torque converter-to-flywheel bolts through the starter motor hole.
32. Remove the torque converter-to-flywheel bolts.
33. Remove the front engine mount. Refer to «Engine Mount Replacement - Front»(ref-239708-S34250652082006080100000) in Engine Mechanical - 3.4L.
34. Remove the through bolt (1) from the rear transaxle mount (3) and bracket (2).
35. Place a universal frame support fixture under the frame.
36. Lower the vehicle until the frame contacts the frame support fixture.
37. Remove the frame-to-body bolts. Discard the bolts.
38. Raise the vehicle up away from the frame and remove the frame from under the vehicle.
39. Disconnect the right and left drive shafts from the intermediate shaft and transaxle. Refer to «Wheel Drive Shaft Replacement - Front»(/chevrolet/equinox/i-2004-2009/remont/axle-shafts/#wheel-drive-shafts__wheel-drive-shaft-replacement-front) in Wheel Drive Shafts. Secure both drive shafts out of the way.
40. Remove the intermediate shaft. Refer to «Intermediate Shaft Replacement (L61)»(/chevrolet/equinox/i-2004-2009/remont/axle-shafts/#wheel-drive-shafts__intermediate-shaft-replacement-l61) or «Intermediate Shaft Replacement (L66)»(/chevrolet/equinox/i-2004-2009/remont/axle-shafts/#wheel-drive-shafts__intermediate-shaft-replacement-l66) in Wheel Drive Shafts.
41. If vehicle is equipped with all wheel drive (AWD) complete the following steps: Remove the rear propeller shaft. Refer to «Propeller Shaft Replacement»(/chevrolet/equinox/i-2004-2009/remont/driveshaft-universal-joints/#propeller-shaft-and-universal-joints) in Propeller Shaft. Remove the transfer case mounting bracket. Refer to «Transfer Case Mounting Bracket Replacement»(/chevrolet/equinox/i-2004-2009/remont/transfer-case/#transfer-case-nvg-900-service-troubleshooting) in Transfer Case - NVG 900. Disconnect the vent hose from the top of the transfer case.
42. Support the transaxle with a suitable transaxle jack.
43. Remove the 4 lower transaxle-to-engine bolts.
44. Slide the transaxle away from the engine until the transaxle torque-converter clears the flywheel.
45. If equipped with a drive axle seal dust cover, discard it and do not replace it.
46. Lower the transaxle away from the vehicle.
47. If the vehicle is equipped with AWD complete the following steps: Remove the retaining ring from the stub shaft for tool installation. Discard the retainer ring. Remove the stub shaft from the transfer case using the J 6125-1B and J 38868 . Remove the bolts securing the transfer case to the transaxle. Remove the transfer case from the transaxle.
48. If the vehicle is equipped with front wheel drive (FWD) complete the following steps: Remove the bolts (1) securing the rear transaxle mount bracket to the transaxle. Remove the rear transaxle mount bracket (2) from the transaxle.

1. If the vehicle is equipped with FWD complete the following steps: Install the rear transaxle mount bracket (2) to the transaxle. Install the bolts (1) securing the rear transaxle mount bracket to the transaxle. Tighten: Tighten the bolts to 55 N.m (41 lb ft).
2. If the vehicle is equipped with AWD complete the following steps: Install the transfer case to the transaxle. Install the bolts securing the transfer case to the transaxle. Tighten: Tighten the bolts to 60 N.m (44 lb ft). Install the stub shaft using the J 6125-1B and J 38868 Install a NEW retaining ring on the stub shaft
3. Raise the transaxle up into the vehicle engine compartment.
4. Align and install the transaxle to the engine.
5. Install the 4 lower transaxle-to-engine bolts. Tighten: Tighten the bolts to 75 N.m (55 lb ft).
6. If the vehicle is equipped with AWD complete the following steps: Connect the vent hose to the top of the transfer case. Install the transfer case mounting bracket. Refer to «Transfer Case Mounting Bracket Replacement»(/chevrolet/equinox/i-2004-2009/remont/transfer-case/#transfer-case-nvg-900-service-troubleshooting) in Transfer Case - NVG 900. Install the rear propeller shaft. Refer to «Propeller Shaft Replacement»(/chevrolet/equinox/i-2004-2009/remont/driveshaft-universal-joints/#propeller-shaft-and-universal-joints) in Propeller Shaft.
7. Install the intermediate shaft. Refer to «Intermediate Shaft Replacement (L61)»(/chevrolet/equinox/i-2004-2009/remont/axle-shafts/#wheel-drive-shafts__intermediate-shaft-replacement-l61) or «Intermediate Shaft Replacement (L66)»(/chevrolet/equinox/i-2004-2009/remont/axle-shafts/#wheel-drive-shafts__intermediate-shaft-replacement-l66) in Wheel Drive Shafts.
8. Install the right and left drive shafts to the intermediate shaft and transaxle. Refer to «Wheel Drive Shaft Replacement - Front»(/chevrolet/equinox/i-2004-2009/remont/axle-shafts/#wheel-drive-shafts__wheel-drive-shaft-replacement-front) in Wheel Drive Shafts.
9. Install the frame to the vehicle.
10. Install NEW frame-to-body bolts. Tighten: Tighten the bolts to 155 N.m (114 lb ft).
11. Install the bolt (1) through the rear transaxle mount (3) and transaxle mount bracket (2). Tighten: Tighten the bolt (1) to 110 N.m (80 lb ft).
12. Install the front engine mount. Refer to «Engine Mount Replacement - Front»(ref-239708-S34250652082006080100000) in Engine Mechanical - 3.4L.
13. Turn the crankshaft balancer bolt clockwise to gain access to the torque converter-to-flywheel bolts through the starter motor hole.
14. Install the torque converter to flywheel bolts. Tighten: Tighten the bolt to 60 N.m (44 lb ft).
15. Install the starter motor. Refer to «Starter Motor Replacement»(/chevrolet/equinox/i-2004-2009/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
16. Install the engine-to-transaxle brace (3).
17. Install the engine-to-transaxle brace bolts (1, 2). Tighten: Tighten the bolts to 50 N.m (37 lb ft).
18. Install the transaxle oil cooler lines and seals to the transaxle. Refer to «Oil Cooler Pipe Seals Replacement»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2__oil-cooler-pipe-seals-replacement) .
19. Install the front bumper fascia air deflector. Refer to «Air Deflector Replacement - Front Bumper Fascia»(/chevrolet/equinox/i-2004-2009/remont/exterior-body-panels/#bumper-system) in Bumpers.
20. Install the right and left lower ball joints to the steering knuckles. Refer to «Lower Control Arm Replacement»(/chevrolet/equinox/i-2004-2009/remont/suspension-front/#front-suspension-system__lower-control-arm-replacement) in Front Suspension.
21. Install the right and left stabilizer shaft links to the stabilizer shaft. Refer to «Stabilizer Shaft Link Replacement»(/chevrolet/equinox/i-2004-2009/remont/suspension-front/#front-suspension-system) in Front Suspension.
22. Install the right and left outer tie rod ends to the steering knuckles. Refer to «Rack and Pinion Outer Tie Rod End Replacement»(/chevrolet/equinox/i-2004-2009/remont/manual-power-steering/#power-steering-system) in Power Steering System.
23. Connect the steering intermediate shaft to the steering gear.
24. Install a NEW pinch bolt to the steering intermediate shaft. Tighten: Tighten the bolt to 34 N.m (25 lb ft).
25. Install the right and left side engine splash shields. Refer to «Splash Shield Replacement - Engine»(/chevrolet/equinox/i-2004-2009/remont/exterior-body-panels/#body-front-end) in Body Front End.
26. Install both front wheels. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/equinox/i-2004-2009/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
27. Lower the vehicle.
28. Install the left hand transaxle mount to the vehicle.
29. Install the left hand transaxle mount-to-side rail bolts. Tighten: Tighten the bolts to 37 N.m (27 lb ft).
30. Install the left hand transaxle mount to transaxle bolts. Tighten: Tighten the bolts to 50 N.m (37 lb ft).
31. Remove the engine support fixture.
32. Untie the radiator, air conditioning condenser and fan module assembly from the upper radiator support.
33. Install the upper 4 transaxle-to-engine bolts. Tighten: Tighten the bolts to 75 N.m (55 lb ft).
34. Connect the transaxle vent tube.
35. Connect the electrical connector (2) to the output speed sensor.
36. Install the nut and fuel line retaining clip (1) to the transaxle. Tighten: Tighten the nut to 25 N.m (18 lb in).
37. Install the battery negative cable and wire harness ground (1) to the transaxle stud.
38. Install the nut (6) securing the battery negative cable and wire harness ground to the transaxle stud. Tighten: Tighten the nut to 45 N.m (33 lb ft).
39. Connect the electrical connectors (3, 5) to the transaxle range switch.
40. Connect the electrical connector (4) from the input speed sensor.
41. Install the shift control cable bracket. Refer to «Shift Control Cable Bracket Replacement»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2) .
42. Install the battery tray. Refer to «Battery Tray Replacement»(/chevrolet/equinox/i-2004-2009/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
43. Fill the transaxle with fluid. Refer to «Transaxle Fluid Replacement»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2) .
44. Perform the transmission adaptive learn procedure. Refer to «Transmission Adaptive Learn Procedure»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#how-to-diagnosis-troubleshooting-the-automatic-transaxle-af33-5-service__transmission-adaptive-learn-procedure) .

Inspection Procedure

1. Raise the transmission/transaxle in order to relieve tension in the mount.
2. Observe the mount while raising the transmission/transaxle. Raising the transmission/transaxle removes the weight from the mount.
3. Replace the mount if it exhibits any of the following conditions: The hard rubber surface is covered with heat check cracks. The rubber is separated from the outer metal sleeve of the mount. The rubber is split through the center of the transmission mount. The mount is leaking fluid.
4. When replacing the transmission mounts or brackets, refer to the following procedures: «Transmission Mount Replacement - Rear»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2) «Transmission Mount Bracket Replacement - Rear»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2) «Transmission Mount Replacement - Left»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2)

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/equinox/i-2004-2009/remont/hoistjack/#general-information) in General Information.
2. Remove both front tires and wheels. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/equinox/i-2004-2009/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
3. If equipped with AWD, disconnect the stabilizer links from the stabilizer shaft.
4. If equipped with AWD, swing the stabilizer shaft upwards in order to gain additional clearance.
5. Remove the transmission mount-to-bracket through bolt.
6. Remove the transmission mount-to-frame bolts.
7. Remove the transmission mount from the vehicle.

1. Position the transmission mount to the frame.
2. Install the transmission mount-to-frame bolts. Tighten: Tighten the bolt to 50 N.m (37 lb ft).
3. Install the transmission mount-to-bracket through bolt, while aligning the transmission mount to the bracket. Tighten: Tighten the bolt to 110 N.m (81 lb ft).
4. If equipped with AWD, lower the stabilizer shaft and connect the stabilizer links. Tighten: Tighten the stabilizer link nuts to 65 N.m (48 lb ft).
5. Install both front tires and wheels. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/equinox/i-2004-2009/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
6. Lower the vehicle.

1. Support the engine. Refer to «Engine Support Fixture»(ref-239708-S10770509852006080100000) in Engine Mechanical.
2. Remove the battery tray. Refer to «Battery Tray Replacement»(/chevrolet/equinox/i-2004-2009/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
3. Remove the transmission mount to transmission bolts.
4. Remove the transmission mount to frame rail bolts.
5. Remove the mount from the engine.

1. Position the transmission mount on the frame rail.
2. Install the transmission mount to frame rail bolts. Tighten: Tighten the bolts to 37 N.m (27 lb ft).
3. Install the transmission mount to transmission bolts. Tighten: Tighten the bolts to 55 N.m (41 lb ft).
4. Install the battery tray. Refer to «Battery Tray Replacement»(/chevrolet/equinox/i-2004-2009/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
5. Remove the engine support. Refer to «Engine Support Fixture»(ref-239708-S10770509852006080100000) in Engine Mechanical.

1. Remove the rear transmission mount. Refer to «Transmission Mount Replacement - Rear»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2) .
2. Disconnect the intermediate steering shaft from the steering gear.
3. Remove the steering gear to frame bolts.
4. Secure the steering gear upward in order to gain additional clearance.
5. Remove the transmission mount bracket to transmission bolts.
6. Remove the transmission mount bracket from the vehicle.

1. Position the transmission mount bracket to the transmission.
2. Install the transmission mount bracket to transmission bolts. Tighten: Tighten the bolts to 110 N.m (81 lb ft).
3. Lower the steering gear to the frame.
4. Install the steering gear to frame bolts. Tighten: Tighten the bolts to 110 N.m (81 lb ft).
5. Install the intermediate steering shaft to the steering gear.
6. Install the intermediate steering shaft to gear pinch bolt. Tighten: Tighten the bolts to 34 N.m (25 lb ft).
7. Install the rear transmission mount. Refer to «Transmission Mount Replacement - Rear»(/chevrolet/equinox/i-2004-2009/remont/automatic-trans/#automatic-transaxle-af33-5-introduction-2-of-2) .

How to Use This Article

This article provides the following information

1. General diagnosis information on transmissions
2. Procedures for diagnosing the transmission

When you diagnose any condition of the transmission, begin with Diagnostic Starting Point - Automatic Transmission . This procedure indicates the proper path of diagnosing the transmission by describing the basic checks. This procedure will then refer you to the locations of specific checks. After you have determined the cause of a condition, refer to Repair Instructions for repair procedures. If the faulty component is not serviceable without removing the transmission from the vehicle, refer to Unit Repair for repair information.

Basic Knowledge

Note. Do not, under any circumstances, attempt to diagnose a powertrain condition without basic knowledge of this powertrain. If you perform diagnostic procedures without this basic knowledge, you may incorrectly diagnose the condition or damage the powertrain components.

You must be familiar with some basic electronics in order to use this article. You should also be able to use the following special tools

1. A digital multimeter (DMM)
2. A circuit tester
3. Jumper wires or leads
4. A line pressure gage set

Diagnosis

Note. If you probe a wire with a sharp instrument and do not properly seal the wire afterward, the wire corrodes and an open circuit results.

Diagnostic test probes are now available that allow you to probe individual wires without leaving the wire open to the environment. These probe devices are inexpensive and easy to install, and they permanently seal the wire from corrosion.

Scheme 47

Transmission General Description

The AF33-5 is a fully automatic, five speed, electronically controlled, transaxle. It consists primarily of a four-element torque converter, three planetary gear sets, friction and mechanical clutches and a hydraulic pressurization and control system.

The TCM commands shift solenoids, within the transmission, ON and OFF to control shift timing. The TCM controls shift feel through the line pressure control solenoid valve. The TCM also controls the apply and release of the torque converter clutch which allows the engine to deliver the maximum fuel efficiency without sacrificing vehicle performance. The hydraulic system primarily consists of a gear type pump, four control valve bodies, case cover, converter housing and case. The pump maintains the working pressures needed to stroke the servo and clutch pistons that apply or release the friction components. These friction components, when applied or released, support the automatic shifting qualities of the transmission. The friction components used in this transmission consist of seven multiple disc clutches and one band. The multiple disc clutches combine with two mechanical sprag clutches, to deliver six different gear ratios through the gear sets. The gear sets then transfers torque through the front differential assembly and out to the drive axles.

The transmission can be operated in any one of the 6 different ranges.

1. P - Park position enables the engine to be started while preventing the vehicle from rolling either forward or backward. For safety reasons, the vehicle parking brake should be used in addition to the transmission Park position. Since the front differential assembly and drive axles are mechanically locked to the case through the park pawl and front differential transfer drive gear assembly, Park position should not be selected until the vehicle has come to a complete stop.
2. R - Reverse enables the vehicle to be operated in a rearward direction.
3. N - Neutral position enables the engine to start and operate without driving the vehicle. If necessary, this position should be selected to restart the engine while the vehicle is moving.
4. D - Drive range should be used for all normal driving conditions for maximum efficiency and fuel economy. Drive range allows the transmission to operate in each of the five forward gear ratios. Downshifts to a lower gear, or higher gear ratio are available for safe passing by depressing the accelerator or by manually selecting a lower gear with the shift selector.
5. L4 - Low Four range can be used for conditions where it may be desirable to use only three gear ratios. These conditions include towing a trailer and driving on hilly terrain as described above. This range is also helpful for engine braking when descending slight grades. Upshifts and downshifts are the same as in Drive range for first, second and third gears except that the transmission is prevented from shifting above third gear. Low Four can be selected at any vehicle speed but will downshift into third gear only if vehicle speed is low enough not to overrev the engine, calibratable in TCM.
6. L2 - Low Two range adds more performance for congested traffic and hilly terrain. It has the same starting ratio, first gear, as Drive and Low Two ranges but prevents the transmission from shifting above second gear. Thus, Low Two can be used to retain second gear for acceleration and engine braking as desired. Low Two can be selected at any vehicle speed but the transmission will downshift into second gear only if vehicle speed is low enough not to overrev the engine, calibratable in TCM. This range is particularly beneficial for maintaining maximum engine braking when descending steep grades.

Transmission Component and System Description

The mechanical components of the AF33-5 are as follows

1. Torque converter assembly
2. Forward (C1) and direct (C2) clutch assembly
3. Rear sun gear assembly
4. Rear internal gear
5. Front sun gear
6. Front carrier assembly
7. Front internal gear and low clutch sprag (F2) assembly
8. Low and reverse clutch plates and disc assembly (B3)
9. Output gear assembly
10. Second coast clutch and second clutch hub and second clutch sprag (F1) assembly
11. Automatic transmission fluid pump, second coast clutch (B1) and second clutch (B2) assembly
12. 1-2 reverse clutch (B5) assembly
13. 1-2 reverse internal gear
14. 1-2 reverse carrier gear assembly
15. 3rd gear band assembly (B4)
16. 3rd gear band servo piston assembly
17. 4-5 clutch (C3) assembly
18. front differential transfer drive gear assembly
19. front differential assembly
20. Automatic transmission control valve body assembly

The electrical components of the AF33-5 are as follows

1. Automatic transmission output speed sensor (OSS) assembly
2. Automatic transmission input speed sensor (ISS) assembly
3. Reverse, 1st shift solenoid valve assembly (S1) - black
4. 2-3, 3-4 shift solenoid valve assembly (S2) - light gray
5. 1-2, 2-3, reverse shift solenoid valve assembly (S3) - dark gray
6. 3-4, 4-5 shift solenoid valve assembly (S4) - blue
7. Reverse shift solenoid valve assembly (S5) - green
8. Line pressure control solenoid valve assembly (SLT) - blue
9. Lock up pressure control solenoid valve assembly (SLU) - black
10. Shift pressure control solenoid valve assembly (SLS) - green
11. Automatic transmission fluid temperature (TFT) sensor
12. Park/neutral position switch assembly

For more information, refer to Electronic Component Description .

Transmission Adaptive Functions

The AF33-5 uses a line pressure control system which has the ability to adapt the system line pressure in order to compensate for normal wear of clutch fiber plates, seals, springs, etc. The adapt feature is similar in function to fuel control (integrator/block learn).

The AF33-5 transmission uses the adapt function for garage shifts, upshifts, and TCC application. The TCM monitors the input shaft speed in order to determine if the shift is occurring too fast or too slow and adjusts the pressure control solenoid in order to maintain the correct shift feel. Refer to Transmission Adaptive Learn Procedure .

Transmission Oil Life Monitor

Transmission fluid life is determined by monitoring transmission fluid temperature over a period of time. The transmission control module (TCM) calculates transmission fluid life based on a set of temperature ranges stored in TCM memory. A counter increments as the vehicle is driven. The rate at which the counter increments, depends on the temperature range in which the transmission is currently operating. The higher the temperature range, the faster the counter increments. As the counts increment, the TCM will begin to decrease the fluid life percentage from 100, high fluid life, to 0, low fluid life. When the transmission fluid needs to be changed a DTC P1868 will set and turn on the service vehicle soon (SVS) light. The fluid life percentage can be reset with the scan tool.

Scheme 48

The engine coolant and transmission fluid in the AF33-5 shares the temperature lamp telltale. The Engine Coolant telltale lamp in the temperature gage flashes when the transmission temperature reaches 131°C (269°F).

Scheme 49

The Service Vehicle Soon (SVS) lamp will come on when certain transmission diagnostic DTCs are present. The SVS lamp will be cleared when the DTC is cleared and the fault is removed.

Scheme 50

The A/T OSS sensor is an active, hall effect pickup located in the top of the transmission case. This sensor is mounted in the case opposite the parking lock gear (253) that is splined to the front differential transfer drive gear carrier assembly (259) shaft. As the front differential transfer drive gear carrier assembly shaft and parking lock gear rotate, a square wave voltage signal is generated by the "teeth" on the parking lock gear as they pass by the pickup. Therefore, whenever the vehicle is moving, the A/T OSS sensor produces a square wave voltage signal proportional to vehicle speed. The voltage output does not depend on rotation speed. Therefore, the sensor is capable of detecting slow rotational speeds. This signal is sent to the TCM.

The square wave form can then be interpreted as transmission output speed by the TCM through the frequency of square waves in a given time frame. The square waves can be thought of as the parking lock gear teeth. Therefore, the more teeth (or waves) that pass by the pickup in a given time frame, the faster the vehicle is moving. The square wave form is compared to a fixed clock signal internally within the TCM to determine transmission output speed.

Scheme 51

The A/T ISS sensor operates identically to the A/T OSS sensor except it uses the stamped teeth on the forward and direct clutch housing assembly - with input shaft (567) as the rotor (reluctor). Remember that the forward and direct clutch housing assembly - with input shaft is driven at converter turbine speed. The A/T ISS sensor square wave form is also compared to a fixed clock signal internally within the TCM to determine actual converter turbine speed. The TCM uses transmission input and output speeds to help determine line pressure, transmission shift patterns, TCC apply pressure, gear ratios, and TCC slippage for diagnostic purposes.

Scheme 52

The AF33-5 uses five electromagnetic shift solenoid valves to control upshifts and downshifts in all forward gear ranges. These shift solenoid valves are controlled by the TCM and work together in a combination of ON and OFF sequences to control the various shift valves. The TCM uses numerous inputs to determine which solenoid state combination the transmission should be in. The following table shows the solenoid state combination required for each gear range. Refer to Shift Solenoid Valve State and Gear Ratio .

Normally Open Shift Solenoid Valves

Three of the shift solenoid valves used in the AF33-5 (the reverse, 1st SS valve; the 2-3, 3-4 SS valve; and the 3-4, 4-5 SS valve) are referred to as normally open solenoid valves. Normally open shift solenoid valves are de-energized (turned OFF) when the TCM opens the path to ground for the solenoid's electrical circuit. With the solenoid OFF, signal fluid moves the metering ball and plunger away from the exhaust seat. This allows signal fluid to flow past the metering ball and exhaust through the solenoid. As a result of this exhaust, there is no pressure in the signal fluid circuit when the normally open solenoid is OFF. When the TCM provides a path to ground for the electrical circuit to energize (turn ON) the solenoid, current flows through the coil assembly in the solenoid and creates a magnetic field. The magnetic field moves the plunger inside the solenoid and seats the metering ball against the exhaust seat, thereby blocking the exhaust passage and causing signal fluid pressure to increase.

Normally Closed Shift Solenoid Valves

The remaining two shift solenoid valves used in the AF33-5 (the 1-2, 2-3, reverse SS valve and the reverse SS valve) are referred to as normally closed solenoid valves. Normally closed shift solenoid valves function similar to normally open shift solenoid valves in that the TCM controls the path to ground for the electrical circuit to turn the solenoid ON or OFF. The normally closed shift solenoid valves are de-energized (turned OFF) when the TCM opens the path to ground for the solenoid's electrical circuit. However, when a normally closed solenoid is OFF, spring pressure seats the plunger and metering ball against the exhaust seat, thereby blocking the exhaust passage and causing signal fluid pressure to increase. When the TCM provides a path to ground for the electrical circuit to energize (turn ON) the solenoid, current flows through the coil assembly in the solenoid and creates a magnetic field. The magnetic field moves the plunger against spring force and moves the metering ball away from the exhaust seat. This allows signal fluid to flow past the metering ball and exhaust through the solenoid. As a result of this exhaust, there is no pressure in the signal fluid circuit when the normally closed solenoid is ON.

Scheme 53

The line pressure control solenoid valve (normally high, 3-port linear pressure control solenoid) is a precision electronic pressure regulator that controls transmission line pressure based on current flow through its coil windings. As current flow is increased, the magnetic field produced by the coil moves the solenoid's plunger further away from the exhaust port. Opening the exhaust port decreases the output fluid pressure regulated by the line pressure control solenoid valve, which ultimately decreases line pressure. The TCM controls the line pressure control solenoid valve based on various inputs including throttle position, transmission fluid temperature and gear state.

Duty Cycle, Frequency and Current Flow

A "duty cycle" may be defined as the percentage of time current is flowing through a solenoid coil during each cycle. The number of cycles that occur within a specified amount of time, usually measured in seconds, is called "frequency". Typically, the operation of an electronically controlled pulse width modulated solenoid is explained in terms of duty cycle and frequency.

The TCM controls the line pressure control solenoid valve on a positive duty cycle at a fixed frequency of 292.5 Hz (cycles-per-second). A higher duty cycle provides a greater current flow through the solenoid. The high (positive) side of the line pressure control solenoid valve electrical circuit at the TCM controls the line pressure control solenoid valve operation. The TCM provides a ground path for the circuit, monitors average current and continuously varies the line pressure control solenoid valve duty cycle to maintain the correct average current flowing through the line pressure control solenoid valve.

Electronic Component Description

Line pressure control solenoid valve resistance should measure between 5.0 and 5.6 ohms when measured at 20°C (68°F).

The duty cycle and current flow to the line pressure control solenoid valve are mainly affected by throttle position (engine torque) and they are inversely proportional to throttle angle (engine torque). In other words, as the throttle angle (engine torque) increases, the duty cycle is decreased by the TCM which decreases current flow to the line pressure control solenoid valve. Current flow to the line pressure control solenoid valve creates a magnetic field that moves the solenoid plunger against spring force.

Scheme 54

The TCC lock up pressure control solenoid valve is a normally low, 3-port linear pressure control solenoid used to control the apply and release of the 2nd (B2) and low and reverse (B3) clutches, and the torque converter clutch. The TCM operates the solenoid with a negative duty cycle at a fixed frequency of 32 Hz to control the rate of clutch apply/release. The solenoid's ability to "ramp" the clutch apply and release pressures results in a smoother clutch operation.

When vehicle operating conditions are appropriate to apply the TCC, the TCM increases the duty cycle to allow the TCC lock up pressure control solenoid valve to command lock up control (12) and TCC signal (13) fluid pressure at a level sufficient to move the lock up relay valve and the lock up control valve to the apply position. Release (4) fluid pressure is directed to exhaust, and apply (5) fluid is directed to the apply side of the converter pressure plate/damper assembly. The TCM then increases the duty cycle to control a slippage of 20-80 RPM between the pressure plate/damper assembly and the converter cover. This provides for improved filtration of engine vibrations and allows the TCC to apply at low engine speeds in 2nd, 3rd, 4th and 5th gear. At high speed, lock up mode is set by activating the TCC lock up pressure control solenoid valve at maximum duty cycle.

Release of the TCC is achieved by decreasing the duty cycle to a level low enough to allow spring force to move the lock up relay valve and the lock up control valve to the release position. Apply (5) fluid is directed to exhaust and converter feed (3) fluid is directed into the release (4) circuit to the release side of the pressure plate/damper assembly.

There are also some operating conditions that may prevent or enable TCC apply under various conditions (engine temperature, transmission temperature, brake switch activation) depending on vehicle application.

TCC lock up pressure control solenoid valve resistance should measure between 5.0 and 5.6 ohms when measured at 20°C (68°F).

Scheme 55

The shift pressure control solenoid valve (normally high, 3-port linear pressure control solenoid) is a precision electronic pressure regulator that controls transmission clutch apply pressure based on current flow through its coil windings. As current flow is increased, the magnetic field produced by the coil moves the solenoid's plunger further away from the exhaust port. Opening the exhaust port decreases the output fluid pressure regulated by the shift pressure control solenoid valve, which ultimately decreases clutch apply pressure. The TCM controls the shift pressure control solenoid valve based on various inputs including throttle position, transmission fluid temperature and gear state.

A "duty cycle" may be defined as the percentage of time current is flowing through a solenoid coil during each cycle. The number of cycles that occur within a specified amount of time, usually measured in seconds, is called "frequency". Typically, the operation of an electronically controlled pulse width modulated solenoid is explained in terms of duty cycle and frequency.

The TCM controls the shift pressure control solenoid valve on a positive duty cycle at a fixed frequency of 292.5 Hz (cycles-per-second). A higher duty cycle provides a greater current flow through the solenoid. The high (positive) side of the shift pressure control solenoid valve electrical circuit at the TCM controls the shift pressure control solenoid valve operation. The TCM provides a ground path for the circuit, monitors average current and continuously varies the shift pressure control solenoid valve duty cycle to maintain the correct average current flowing through the shift pressure control solenoid valve.

Electronic Component Description

Shift pressure control solenoid valve resistance should measure between 5.0 and 5.6 ohms when measured at 20°C (68°F).

The duty cycle and current flow to the shift pressure control solenoid valve are mainly affected by throttle position (engine torque) and they are inversely proportional to throttle angle (engine torque). In other words, as the throttle angle (engine torque) increases, the duty cycle is decreased by the TCM which decreases current flow to the shift pressure control solenoid valve. Current flow to the shift pressure control solenoid valve creates a magnetic field that moves the solenoid plunger against spring force.

Scheme 56

The TFT sensor (36) is part of the automatic transmission wiring harness assembly (33). The TFT sensor is a resistor, or thermistor, which changes value based on temperature. The sensor has a negative-temperature coefficient. This means that as the temperature increases, the resistance decreases, and as the temperature decreases the resistance increases. The TCM supplies a 5-volt reference signal to the sensor and measures the voltage drop in the circuit. When the transmission fluid is cold the sensor resistance is high and the TCM detects high signal voltage. As the fluid temperature warms to a normal operating temperature, the resistance becomes less and the signal voltage decreases. The TCM uses this information to maintain shift quality and torque converter clutch apply quality over the operating temperature range.

If transmission fluid temperatures become excessively high [above approximately 140°C (284°F) (calibratable in the TCM)], the TCM will disable ECCC function and command lock up mode. Applying the TCC serves to reduce transmission fluid temperatures created by the fluid coupling in the torque converter with the TCC released.

Above approximately 149°C (300°F) (calibratable in the TCM), the TCM will set a transmission fluid temperature code. This causes the TCM to use a fixed value of 140°C (284°F) (calibratable in the TCM) as the transmission fluid temperature input signal.

Scheme 57

The park/neutral position switch assembly (75) is a sliding contact switch attached to the manual shift detent lever assembly (710) outside the transmission case. The four inputs to the TCM from the park/neutral position switch assembly indicate which position is selected by the transmission selector lever. This information is used for engine controls as well as determining the transmission shift patterns. The state of each input is available for display on the scan tool. The four input parameters represented are Mode A, Mode B, Mode C and Mode PA (P/N Start). The TCM also communicates the park/neutral switch status to the BCM via serial data. The BCM uses this data to control the Electronic PRNDL display on the shifter. The BCM controls the LED's in the PRNDL display through 4 control circuits. The BCM has 8 DTCs for these 4 control circuits. These DTCs diagnose a shorted or an open for each circuit.

Special Tools

Special Tools Illustration Tool Number/Description J 6125-1B Slide Hammer with Adapter J 21867 Pressure Gage J 21867-50 Transmission Line Pressure Adapter J 35616 GM-Approved Terminal Test Kit J 35944 Cooler Flush Adapter J 36346 Fascia Retainer Remover J 38868 Output Shaft Assembly Remover and Installer J 41239-1 Cooler Line Seal Installer J 44809 Output Shaft Seal Installer J 45000 Seal Remover J 45096 Transmission Oil Cooling System Flush and Flow Test Tool J 45187 Differential Output Shaft Oil Seal Installer J 45201 Cooler Line Seal Remover J 45404 Transmission Indicator Alignment Tool

Scheme 58

Scheme 59

Scheme 60

Scheme 61

Scheme 62

Scheme 63

Scheme 64

Scheme 65

See also:
• DTC P0115
• DTC P0762
• Lifting and Jacking the Vehicle
• Component Fastener Tightening Notice
• Fastener Notice
• Trim Bezel Replacement - Center
• SIR Disabling and Enabling Zone 8
• Battery Tray Replacement
• Transmission Control Module Programming and Setup
• Transmission Adaptive Learn Procedure
• Tire and Wheel Removal and Installation
• Splash Shield Replacement - Engine
• Transmission Fluid Checking Procedure
• Wheel Drive Shaft Replacement - Front
• Transfer Case Replacement
• Rack and Pinion Outer Tie Rod End Replacement
• Stabilizer Shaft Link Replacement
• Lower Control Arm Replacement
• Air Deflector Replacement - Front Bumper Fascia
• Intermediate Shaft Replacement (L61)
• Intermediate Shaft Replacement (L66)
• Propeller Shaft Replacement
• Transfer Case Mounting Bracket Replacement
• Diagnostic Starting Point - Automatic Transmission
• Fluid Level Indicator Replacement
• Special Tools
• Transaxle Range Switch Adjustment
• Oil Cooler Pipe Seals Replacement
• Shift Solenoid Valve State and Gear Ratio