Automatic Transmission - 2ml70 - Symptom Troubleshooting & Diagnosis Cadillac Escalade GMT900

Symptoms - Automatic Transmission

Note. Use the symptom tables only if the following conditions are met: Refer to Diagnostic Starting Point - Vehicle . There are no DTCs set. The control modules can communicate via the serial data link. Review the system operation in order to familiarize yourself with the system functions. Refer to Transmission General Description and Transmission Component and System Description .

Visual/Physical Inspection

Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

1. Fluid Diagnosis «Transmission Fluid Level and Condition Check»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__transmission-fluid-level-and-condition-check) «Main Fluid Pump Pressure High or Low»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__main-fluid-pump-pressure-high-or) «Auxiliary Fluid Pump Pressure High or Low»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__auxiliary-fluid-pump-pressure-high-or) «Automatic Transmission Fluid Leaks»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__automatic-transmission-fluid-leaks) «Fluid Leak Diagnosis»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis)
2. Transmission Temperature «Automatic Transmission Overheating»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis) «Transmission Hot - Idle Engine»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__transmission-hot-idle-engine)
3. Noise and Vibration Diagnosis «Whine/Growl Noise That Changes with Vehicle Speed»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__whinegrowl-noise-that-changes-with-vehicle) «Noise in First or Reverse Gear»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__noise-in-first-or-reverse-gear) «Noise in First, Second, Third, Fourth, or Reverse Gear»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__noise-in-first-second-third-fourth) «Noise in First, Second, or Reverse Gear»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__noise-in-first-second-or-reverse) «Noise in Fourth Gear»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__noise-in-fourth-gear) «Vibration»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__vibration) «Noise and Vibration Analysis»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__noise-and-vibration-analysis)
4. Range Performance Diagnosis «No Park or Drive»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__no-park-or-drive) «No Drive in All Ranges»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__no-drive-in-all-ranges) «No Reverse Gear»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__no-reverse-gear) «No Drive or Reverse Gear»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__no-drive-or-reverse-gear)
5. Shift Quality Feel Diagnosis «Harsh Garage Shift»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__harsh-garage-shift) «Harsh, Soft, Delayed or Slipping First or Reverse Gear»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__harsh-soft-delayed-or-slipping-first) «Harsh, Soft, Delayed or Slipping 1-2-3-4 Shift»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__harsh-soft-delayed-or-slipping-1-2-3-4) «Harsh, Soft, Delayed, or Slipping Reverse Gear»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__harsh-soft-delayed-or-slipping-reverse)
6. Shift Pattern «No First Gear»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__no-first-gear) «No First and Reverse Gears»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__no-first-and-reverse-gears) «No First, Second, Third, or Fourth Gear»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__no-first-second-third-or-fourth) «No First, Second, or Reverse Gear»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__no-first-second-or-reverse-gear) «Stuck in First or Reverse Gear»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__stuck-in-first-or-reverse-gear)
7. Symptom Not Found or No Symptom Detected «Transmission Fluid Level and Condition Check»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__transmission-fluid-level-and-condition-check) «Road Test»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__road-test) «Line Pressure Check»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__line-pressure-check)

Scheme 55

1. Inspect the control solenoid (w/body and TCM) valve assembly connectors and pins (2, 3, 4) for the following conditions: Damage Bent pins Debris Broken retaining tab Contamination
2. Ensure no metallic debris is inside the connectors near the terminal pins.
3. Inspect the control solenoid (w/body and TCM) valve assembly solenoid leads (1) for contamination or metallic debris.
4. Inspect the 4 control solenoid (w/body and TCM) valve assembly filter plate retaining tabs (5) for cracks and ensure proper tension when filter plate is attached.

Special Tools

J 38522 Variable Signal Generator

Scheme 56

The purpose of this test is to provide a simulated output speed sensor signal to the control solenoid valve assembly.

Circuit/System Testing

1. Disconnect the wiring harness connector from the B14A Automatic Transmission Output Shaft Speed Sensor.
2. Connect the red lead of J 38522 to the OSS voltage circuit terminal A and the black lead to the OSS signal circuit terminal B. Adjust the J 38522 Signal to 8 volts, the Frequency to 120 and the Percent Duty Cycle to 50. Ignition ON, verify the Transmission OSS parameter display is 100-400 RPM.

1. If the reading is not within the specified range, test the output speed sensor circuits for a short to voltage, open/high resistance, or short to ground. If the circuits test normal, replace the Q8 control solenoid valve assembly.
2. If the reading is within the specified range, replace B14A Automatic Transmission Output Shaft Speed Sensor.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Output Speed Sensor Replacement»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-repair-instructions-on-vehicle) for B14A Automatic Transmission Output Shaft Speed Sensor.
2. «Control Module References»(/cadillac/escalade/gmt900-2006-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for Q8 control solenoid valve assembly replacement, setup, and programming.

DT-47825 Control Solenoid Test Kit. See Special Tools .

Scheme 57

The purpose of this procedure is to test the functionality of the control solenoid (w/body and TCM) valve assembly solenoids for a gross stuck open or stuck closed condition, or a faulty transmission fluid pressure (TFP) switch. DT-47825 is bolted to the control solenoid (w/body and TCM) valve assembly on the valve body mounting surface. See Special Tools . Pressurized air is passed into the aluminum test block, through the control solenoid (w/body and TCM) valve assembly solenoid passage and back to the outlet port on the test block. A scan tool is used to command the solenoids ON and OFF. While observing the airflow, one can determine the valve functionality. The recommended shop air pressure for this test is regulated to 90-100 psi.

Preliminary Procedures

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/escalade/gmt900-2006-2014/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
2. Remove the transmission fluid pan and filter. Refer to «Transmission Fluid Pan Replacement»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-repair-instructions-on-vehicle) and «Automatic Transmission Fluid Filter and Auxiliary Fluid Pump Filter Replacement»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-repair-instructions-on-vehicle) .
3. Remove the transmission electrical connector. Refer to «Automatic Transmission Electrical Connector Passage Sleeve Replacement»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-repair-instructions-on-vehicle) .
4. Remove the control solenoid (w/body and TCM) valve assembly from the transmission. Refer to «Control Solenoid Valve and Transmission Control Module Assembly Replacement»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-repair-instructions-on-vehicle) .
5. Perform the «Control Solenoid Valve and Transmission Control Module Assembly Inspection»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis) procedure.

Scheme 58

Note. With the ignition ON and the engine OFF, the transmission control module (TCM) will normally cycle some of the transmission solenoids On and Off to facilitate keeping the ports and solenoids clean and free of debris. This dither function is a normal activity and will cause the valves to cycle open and closed quickly when the TCM is powered up. This may cause some air to exit the ports where the PSI gauge is not connected as those solenoids cycle on and off.

1. Align and install the electrical connector sleeve to the control solenoid (w/body and TCM) valve assembly and secure with the connector slide lock.
2. If necessary, clean each side of the filter plate assembly and install the filter plate assembly back on the control solenoid (w/body and TCM) valve assembly. Clean the mounting surface of the DT-47825 . See «Special Tools»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-special-tools-equipment) .
3. Bolt the DT-47825 to the control solenoid (w/body and TCM) valve assembly mounting surface. See «Special Tools»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-special-tools-equipment) . Use the bolts and washers supplied with the tool to attach the test block. Tighten the bolts to 5 N.m (44 lb in).
4. Connect the test harness supplied with the DT-47825 to the vehicle harness and to the control solenoid (w/body and TCM) valve assembly. See «Special Tools»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-special-tools-equipment) . Engage the connector locks.
5. Turn the ignition ON.
6. Cover the DT-47825 test block ports with a shop towel. See «Special Tools»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-special-tools-equipment) . Transmission fluid may exit these ports when the solenoids are commanded ON.
7. Connect regulated shop air to the DT-47825 air inlet. See «Special Tools»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-special-tools-equipment) . Do not exceed the recommended air pressure of 620.5-689.4 Kpa (90-100 psi).
8. With a scan tool, in the Hybrid Control Module Special Functions menu, command the Aux. Trans. Pump Speed to 75 percent for 5 seconds. Failure to command the Aux. Trans. Pump Speed to 75 percent for 5 seconds will prevent the Shift Solenoid 1 from functioning correctly during testing. Do not turn off the ignition for the remainder of these tests.
9. With the ignition ON and the scan tool communicating with the vehicle, command the solenoid in question On and Off. Observe the airflow at the appropriate test port for a change as you command the solenoid. Refer to Control Solenoid (w/Body and TCM) Valve Assembly Solenoid Performance Test Plate to Component Identification for correct solenoid function and test plate port connections for the solenoid being tested.
10. The solenoid should allow air pressure to flow or prevent air pressure flow depending on the solenoid state. The test results are read on the pressure gauge.
11. Command the solenoid valve On and Off several times to determine the condition of the solenoid in question. Release the test air pressure from the pressure the gauge between solenoid tests.

Control Solenoid (w/Body and TCM) Valve Assembly Solenoid Performance Test Block to Component Identification

Scheme 59

1. Remove the DT-47825 from the control solenoid (w/body and TCM) valve assembly. See «Special Tools»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-special-tools-equipment) .
2. With the ignition ON and the scan tool communicating with the vehicle, using a soft blunt object, depress each transmission fluid pressure (TFP) switch port. The corresponding TFP Switch parameter on the scan tool display should display HI when depressed and Low when released. If the control solenoid (w/body and TCM) valve assembly fails any of the above tests, replace the control solenoid (w/body and TCM) valve assembly. If the control solenoid (w/body and TCM) valve assembly passes the above tests, the concern is internal to the transmission.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for control solenoid (w/body and TCM) valve assembly replacement, setup, and programming.

Transmission Fluid Level and Condition Check

1. Start the engine and operate the vehicle for 15 minutes or until the transmission fluid reaches an operating temperature of 65-80°C (150-180°F).
2. Park the vehicle on a level surface.
3. With your foot on the brake, move the shift lever through each gear range. Pause for about 3 seconds in each range, ending in PARK.
4. Apply the parking brake and let the engine idle for 3 minutes.
5. Remove the transmission fluid level indicator. Wipe the indicator clean. Insert the indicator by pushing it back in all the way. Give the indicator a full twist in order to close.
6. Wait 3 seconds and remove the indicator.
7. Read both sides of the indicator. The fluid must be within the hot cross-hatched area using the lowest level reading.

Fluid Condition Inspection

Inspect the fluid color. The fluid should be red or dark brown.

1. If the fluid color is very dark or black and has a burnt odor, inspect the fluid and inside of the bottom pan for excessive metal particles or other debris. A small amount of "friction" material in the bottom pan is a "normal" condition. If large pieces and/or metal particles are noted in the fluid or bottom pan, flush the oil cooler and cooler lines and overhaul the transmission. If there are no signs of transmission internal damage noted, replace the fluid filter assembly, repair the oil cooler, and flush the cooler lines.
2. Fluid that is cloudy or milky or appears to be contaminated with water indicates engine coolant or water contamination. Refer to «Engine Coolant/Water in Transmission»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__engine-coolantwater-in-transmission) .

Road Test

Note. The Road Test Procedure should be performed only as part of the Symptom Diagnosis. Refer to Symptoms - Automatic Transmission .

The following test provides a method of evaluating the condition of the automatic transmission. The test is structured so that most driving conditions would be achieved. The test is divided into the following parts

1. Electrical Function Check
2. Upshift Control
3. Part Throttle Detent Downshifts
4. Manual Downshifts
5. Coasting Downshifts
6. Manual Gear Range Selection REVERSE Driver Shift Control

Note. Complete the test in the sequence given. Incomplete testing cannot guarantee an accurate evaluation.

Before the road test, ensure the following

1. The engine is performing properly.
2. Transmission fluid level is correct. Refer to «Transmission Fluid Level and Condition Check»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__transmission-fluid-level-and-condition-check) .
3. Tire pressure is correct.

During the road test

1. Perform the test only when traffic conditions permit.
2. Operate the vehicle in a controlled, safe manner.
3. Observe all traffic regulations.
4. View the scan tool data while conducting this test. Take along qualified help in order to operate the vehicle safely.
5. Observe any unusual sounds or smells.

After the road test, check the following

1. Inspect for proper transmission fluid level. Refer to «Transmission Fluid Level and Condition Check»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__transmission-fluid-level-and-condition-check) .
2. Inspect for any diagnostic trouble codes (DTCs) that may have set during the testing. Refer to the applicable DTC.
3. Monitor the scan tool data for any abnormal readings or data.
4. Inspect for fluid leaks. Refer to «Fluid Leak Diagnosis»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis) .

Electrical Function Check

Perform this procedure first in order to ensure the electronic transmission components are functioning properly. If these components are not checked, a simple electrical condition could be misdiagnosed.

1. Connect the scan tool.
2. Ensure the gear selector is in PARK and set the parking brake.
3. Start the engine. NOTE: Note that the engine may go in to AutoStop Mode depending on which gear is selected and many other variables. For more information on AutoStop Mode refer to «Hybrid Modes of Operation Description»(/cadillac/escalade/gmt900-2006-2014/remont/engine-control-systems/#hybrid-engine-controls-description-and-operation__hybrid-modes-of-operation-description) .
4. Verify that the following scan tool data can be obtained and is functioning properly. Refer to «Control Module References»(/cadillac/escalade/gmt900-2006-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for typical data values. Data that is questionable may indicate a concern. Engine Torque Drvr Axle Torque Request APP Indicated Angle Engine Speed Calc. Trans Input Speed Transmission OSS OSS Supply Voltage Vehicle Speed Output Shaft Direction Clutch 1 Slip Speed Clutch 2 Slip Speed Clutch 3 Slip Speed Clutch 4 Slip Speed Clutch 1 Status Clutch 2 Status Clutch 3 Status Clutch 4 Status IAT BPP Signal Shift Solenoid 1 Shift Solenoid 2 Gear Ratio Driver Shift Control Driver Shift Request IMS A/B/C/P IMS TFP Switch 1 TFP Switch 3 TFP Switch 4 TFP Switch 5 ECT Trans. Fluid Temp. TCM Temperature PC Sol. 2 Pressure Cmd. PC Sol. 3 Pressure Cmd. PC Sol. 4 Pressure Cmd. PC Sol. 5 Pressure Cmd. Line PC Sol. Pressure Cmd. Engine Run Time EC Ignition Relay Feedback Signal Ignition Voltage
5. Check the garage shifts. Apply the brake pedal and ensure the parking brake is set. NOTE: If the vehicle was in the AutoStop Mode the engine will start and run when the gear selector is placed in Reverse and M (Manual). If the gear selector is moved very quickly through these ranges and is in the AutoStop Mode the engine will not restart. Move the gear selector through the following ranges: Pause 2 to 3 seconds in each gear position. PARK to REVERSE REVERSE to NEUTRAL NEUTRAL to DRIVE Verify the gear engagements are immediate and not harsh. NOTE: These shifts can not be felt when trans is functioning properly.
6. Monitor transmission range on the scan tool, trans data list. Apply the brake pedal and ensure the parking brake is set. Move the gear selector through all ranges. Pause 2 to 3 seconds in each range. Return gear selector to PARK. Verify that all selector positions match the scan tool display.
7. Check throttle position input. Apply the brake pedal and ensure the parking brake is set. Ensure the gear selector is in PARK. Monitor the scan tool Calc. Throttle Position while increasing and decreasing engine speed with the throttle pedal. The scan tool Calc. Throttle Position percentage should increase and decrease with engine speed.

If any of the above checks do not perform properly, record the result for reference after completion of the road test.

Upshift Control

The hybrid powertrain control module (HPCM) calculates the upshift points based primarily on 2 inputs: throttle position and vehicle speed. When the HPCM determines that conditions are met for a shift to occur, the HPCM commands the shift by closing or opening the ground circuit for the appropriate solenoid.

Perform the following steps

1. Choose a throttle position of 12 percent or 25 percent. All throttle positions shown should be tested to cover the normal driving range.
2. Monitor the following scan tool parameters: Calc. Throttle Position Vehicle Speed Engine Speed Transmission OSS Commanded Gear TFP Switch 1 TFP Switch 3 TFP Switch 4 TFP Switch 5 PC Sol. 2 Pressure Cmd. PC Sol. 3 Pressure Cmd. PC Sol. 4 Pressure Cmd. PC Sol. 5 Pressure Cmd. Shift Solenoid 1 and 2
3. Place the gear selector in the DRIVE position.
4. Accelerate the vehicle using the chosen throttle position. Hold the throttle steady.
5. As the transmission upshifts, there should be a noticeable shift feel or engine speed change within 1 to 2 seconds of the commanded gear change. The feel may not be noticeable. Look for 100-300 RPM engine speed change.
6. Shift speeds may vary slightly due to TFT or other operating variables, including hydraulic delays in responding to electronic controls. Note any harsh, soft or delayed shifts or slipping. Note any noise or vibration.

Part Throttle Downshift

1. Place the gear selector in the DRIVE position.
2. Accelerate the vehicle to 64-88 km/h (40-55 mph) in 4th gear.
3. Quickly increase throttle angle to between 25-30 percent.
4. Verify the transmission downshifts immediately.

Manual Downshifts

Manual downshift testing is not required for vehicles equipped with Driver Shift Control (DSC). This is done by shifting the gear selector to M on the display and then by using the + and - on the rocker switch on the gear selector. The TCM and shift solenoids will automatically override DSC downshifts to protect the transmission from damage.

Coasting Downshifts

1. Place the gear selector in the DRIVE position.
2. Accelerate the vehicle to 4th gear.
3. Release the throttle and apply the brakes
4. Verify the downshifts occur as commanded.

Accelerating Upshifts

1. Place the gear selector in the M position.
2. Press the - until the display shows M1.
3. Accelerate slowly and keep the throttle steady not going over 3,000 RPM Engine speed.
4. Press the + on the gear selector.
5. Verify the upshift occurs as commanded. Repeat step 4 to verify the remaining gears.

Reverse

Note. When the gear selector is placed in Reverse and the vehicle is in AutoStop Mode the Engine will start.

Perform the following test using a 10-15 percent throttle position.

1. With the vehicle stopped, move the gear selector to REVERSE.
2. Slowly accelerate the vehicle.
3. Verify that there is no noticeable slip, noise or vibration.

Driver Shift Control (DSC)

Refer to the owner's manual for specific instructions on DSC. The TCM will upshift automatically when maximum engine speed is achieved and will protect from any downshift which may cause excessive engine RPMs.

Composition Plates

Dry the plates and inspect the plates for the following conditions

1. Pitting
2. Flaking
3. Delamination-splitting or separation of bonded clutch material
4. Wear
5. Glazing
6. Cracking
7. Charring
8. Chips or metal particles embedded in the lining

Replace a composition plate which shows any of these conditions.

Steel Plates

Wipe the plates dry and check the plates for heat discoloration. If the surfaces are smooth, even if color smear is indicated, you can reuse the plate. If the plate is discolored with heat spots or if the surface is scuffed, replace the plate.

Causes of Burned Clutch Plates

The following conditions can result in a burned clutch plate

1. Incorrect usage of clutch or apply plates
2. Engine coolant or water in the transmission fluid
3. A cracked clutch piston
4. Damaged or missing seals
5. Low line pressure
6. Valve body conditions The valve body face is not flat. Porosity is between channels. The valve bushing clips are improperly installed. The checkballs are misplaced.
7. The Teflon® seal rings are worn or damaged.

Engine Coolant/Water in Transmission

If antifreeze or water has entered the transmission, perform the following

1. Disassemble the transmission.
2. Replace all of the rubber type seals. The coolant will attack the seal material which will cause leakage.
3. Replace the composition-faced clutch plate assemblies. The facing material may separate from the steel center portion.
4. Replace all of the nylon parts - washers.
5. Replace the torque dampener.
6. Thoroughly clean and rebuild the transmission, using new gaskets and oil filter.
7. Flush the cooler lines after the transmission cooler has been properly repaired or replaced.

Line Pressure Check

Special Tools

1. J 21867: Pressure Gauge
2. J 45056: Transmission Oil Pressure Gauge Adapter

For equivalent regional tools refer to Special Tools .

Scheme 60

1. Install a scan tool.
2. Start the engine.
3. Inspect the transmission for the proper fluid level. Refer to «Transmission Fluid Level and Condition Check»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__transmission-fluid-level-and-condition-check) .
4. Use the scan tool to inspect for any active or stored diagnostic trouble codes. If there are any DTC's, refer to that DTC table first.
5. Inspect the manual linkage at the transmission for proper function.
6. Turn the engine OFF.
7. Remove the line pressure test hole plug.
8. Install J 45056: oil pressure gauge adapter fitting prior to conncting the oil pressure gauge.
9. Install the J 21867: pressure gauge.
10. Access the Scan Tool Transmission Output Controls for the Line PC Solenoid.
11. Start the engine.
12. Use the scan tool to increase and decrease the Line PC Solenoid in increments of approximately 100 KPa (15 psi). The scan tool commands the increment values automatically.
13. Allow the pressure to stabilize between increments.
14. Compare your pressure readings on the scan tool to those indicated on the J 21867: pressure gauge.
15. If the pressure readings vary greatly, refer to «Main Fluid Pump Pressure High or Low»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__main-fluid-pump-pressure-high-or) .
16. Turn the engine OFF.
17. Disconnect the J 21867: pressure gauge and remove the J 45056: oil pressure gauge adapter fitting.
18. Install the line pressure test hole plug. Tighten the pressure plug to 11 N.m (97 lb in).

Scheme 61

1. Install a scan tool.
2. Start the engine.
3. Inspect the transmission for the proper fluid level. Refer to «Transmission Fluid Level and Condition Check»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__transmission-fluid-level-and-condition-check) .
4. Use the scan tool to inspect for any active or stored diagnostic trouble codes. If there are any DTC's refer to that DTC table.
5. Inspect the manual linkage at the transmission for proper function.
6. Turn the engine OFF, connect Midtronic 165-PSC charger.
7. Remove the auxiliary pump pressure test hole plug.
8. Install J 45056: oil pressure gauge adapter fitting prior to conncting the oil pressure gauge.
9. Install the J 21867: pressure gauge.
10. Access the Scan Tool Hybrid Output Controls for the Aux Trans Pump Speed.
11. Turn key to the Run Position but do not start the engine.
12. Use the scan tool to increase and decrease the Aux Pump Speed in increments of approximately 25%. The scan tool commands the increment values automatically starting with 25% going up to 75% and returning down to 25%. The pump should be allowed to run for 60 seconds at each commanded speed.
13. Allow the pressure to stabilize between increments.
14. Your pressure readings on the J 21867: pressure gauge should slightly increase with each speed command. The J 21867: pressure gauge at 25% should be approximately 40-70 PSI and end up at 75% being approximately 90-120 PSI.
15. If the pressure readings vary greatly, refer to «Auxiliary Fluid Pump Pressure High or Low»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__auxiliary-fluid-pump-pressure-high-or) .
16. Turn the key OFF.
17. Disconnect the J 21867: pressure gauge and remove the J 45056: oil pressure gauge adapter fitting.
18. Install the auxiliary pump pressure test hole plug. Tighten the pressure plug to 11 N.m (97 lb in).

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/escalade/gmt900-2006-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/escalade/gmt900-2006-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/escalade/gmt900-2006-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information

Circuit/System Description

The primary source of heat in the transmission is the drive motor generators. The drive motor generators are cooled by the transmission fluid. Hot fluid exits the drive motor generators and flows to the transmission cooler supply line. The supply line connects to the cooler, which is in front of the radiator. The transmission fluid cooler pipe assembly is equipped with an internal thermostat that opens at 80°C (176°F) for optimum transmission operation and fuel economy. The transmission cooler pipe thermostat is part of the transmission fluid cooler pipe assembly, located near the left side of the radiator and is not serviced separately from the cooler lines, the fluid returns through the transmission fluid cooler pipe assembly and enters the lubrication circuits. After lubricating the internal components, the fluid returns to the oil pan. The transmission fluid temperature (TFT) sensor is located in the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The driver information center (DIC), if equipped, will display "TRANSMISSION HOT - Idle Engine" when the TFT reaches 135°C (275°F). The TFT parameter on the scan tool should rise steadily to a normal operating temperature, and then stabilize. Ask about the customer's driving habits, trailer towing, etc. Ensure the engine cooling system is functioning normally.

Reference Information

Schematic Reference

1. «Automatic Transmission Controls Schematics»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-wiring-schematics)
2. «Park - Engine Running»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-description-and-operation__park-engine-running)
3. «Fluid Passages»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-description-and-operation)

Description and Operation

1. «Transmission General Description»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-description-and-operation__transmission-general-description)
2. «Transmission Indicators and Messages»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-description-and-operation__transmission-indicators-and-messages)

Scan Tool Reference

Control Module References

Special Tools

J 24731: Tempil Stick

Component Testing

1. Perform the «Fluid Leak Diagnosis»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis) .
2. Perform the «Transmission Fluid Level and Condition Check»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__transmission-fluid-level-and-condition-check) procedure.
3. Perform the «Line Pressure Check»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__line-pressure-check) procedure.
4. Perform the «Main Fluid Pump Pressure High or Low»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-symptom-troubleshooting-diagnosis__main-fluid-pump-pressure-high-or) procedure.
5. With a hand held infra red thermometer or J 24731: tempil stick, test for the transmission cooler supply line thermostat opening at 80°C (176°F). The transmission cooler supply line temperature should be higher on the transmission side of the thermostat than the cooler side until 80°C (176°F) is reached. If the thermostat tests stuck open or closed, replace the transmission cooler supply line assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Repair or replace the automatic transmission cooler or lines as necessary. Refer to Transmission Fluid Cooler Pipe Replacement .

Transmission Hot - Idle Engine

This message is displayed and a chime will sound when the TCM detects a transmission fluid temperature greater than 150°C (302°F). A key cycle long enough for the TCM to power down is required to reset the action taken after the transmission has cooled below 150°C (302°F). Prior to the transmission fluid temperature reaching 150°C (302°F), the system will execute the following actions in an attempt to cool the transmission fluid

1. Autostop is inhibited when the transmission fluid temperature is greater than 100°C (212°F).
2. The coolant fans turn on when the transmission fluid temperature is greater than 125°C (257°F).

For diagnostic strategy refer to Automatic Transmission Overheating .

Case Porosity Repair

Some external leaks are caused by case porosity in non-pressurized areas. You can usually repair these leaks with the transmission in the vehicle.

1. Thoroughly clean the area to be repaired with a cleaning solvent. Air dry the area.
2. Using instructions from the manufacturer, mix a sufficient amount of an epoxy to make the repair.
3. While the transmission case is still hot, apply the epoxy. You can use a clean, dry soldering acid brush to clean the area and also to apply the epoxy cement. Make certain that the area to be repaired is fully covered.
4. Allow the epoxy cement to cure for three hours before starting the engine.
5. Repeat the fluid leak diagnosis procedures.

Transmission Fluid Cooler Flushing and Flow Test (J 45096)

GM studies indicate that plugged or restricted transmission oil coolers and pipes cause insufficient transmission lubrication and elevated operating temperatures which can lead to premature transmission failure. Many repeat repair cases could have been prevented by following published procedures for transmission oil cooler flushing and flow checking. This procedure includes flow checking and flushing the auxiliary transmission oil cooler, if equipped.

Note. Use the J 45096: flush and flow test tool or equivalent to flush and flow test the transmission oil cooler and the oil cooler pipes after the transaxle is removed for repairs.

Only GM Goodwrench DEXRON®VI automatic transmission fluid should be used when doing a repair on a GM transmission.

Time allowance for performing the cooler flow checking and flushing procedure has been included in the appropriate labor time guide operations since the 1987 model year. The service procedure steps for oil cooler flushing and flow testing are as follows

Cooler Flow Check and Flushing Steps

1. Machine Set-up
2. Determine Minimum Flow Rate
3. Back Flush
4. Forward Flush
5. Flow Test
6. Code Recording Procedure
7. Clean-up

Special Tools

1. J 45096: Transmission Oil Cooling System Flush and Flow Test Tool
2. J 45096-30: Transmission Cooler Flush Adapter
3. Shop air supply with water/oil filters, regulator and pressure gauge - minimum 90 psi
4. Eye protection
5. Rubber gloves

For equivalent regional tools, refer to Special Tools .

Machine Set-up

1. Verify that the main power switch (1) is in the OFF position.
2. Place the main function switch (2) in the IDLE position.
3. Connect J 45096: flush and flow test tool to the vehicle 12V DC power source by connecting the red battery clip to the positive, +, battery post on the vehicle and connect the negative lead to a known good chassis ground.
4. Turn the main power switch to the ON position.
5. Fill the supply tank with Dexron®VI through the fill port.
6. Reinstall and tighten the fill cap.
7. Connect a shop air supply hose to the quick-disconnect on the rear panel marked SUPPLY AIR.

Determine Minimum Flow Rate

1. From the machine display, identify the temperature of the automatic transmission fluid that is stored in the supply vessel of J 45096: flush and flow test tool.
2. Determine whether the transmission oil cooler is steel or aluminum by using a magnet (1) at the cooler flange (2) at the radiator.
3. Refer to the table below. Using the temperature from step 1, locate on either the Steel MINIMUM Flow Rate table or the Aluminum MINIMUM Flow Rate table the minimum flow rate in gallons per minutes (GPM). Record the minimum flow rate in GPMs and the supply fluid temperature for further reference. Example: Fluid temperature: 75°F Cooler type: Steel The MINIMUM flow rate for this example would be 0.8 GPM.
4. Inspect transmission oil cooler lines for damage or kinks that could cause restricted oil flow. Repair as needed and refer to the appropriate GM service manual procedures.

Minimum Flow Rate in Gallons Per Minute (gpm)

Back Flush Procedure

1. Connect the J 45096-30: flush adapter (1) to the vehicle transmission oil cooler supply and return lines at the transmission.
2. Connect the black supply hose (1) to the return line, top connector of the transmission, and the clear waste hose (2) to the feed line, bottom connector of the transmission, to the vehicle cooler lines. This is the reverse flow - backflush direction.
3. Turn the main function switch to the FLUSH position. Allow the machine to operate for 30 seconds.
4. Turn the main function switch to the IDLE position and allow the supply vessel pressure to dissipate.

Forward Flush

1. Disconnect the supply and waste hoses from the vehicle cooler lines. Reverse the supply and waste hoses to provide a normal flow direction.
2. Turn the main function switch to the FLUSH position and allow machine to operate for 30 seconds.

Flow Test

1. Turn the main function switch to the FLOW position and allow the oil to flow for 15 seconds. Observe and note the flow rate; this is the TESTED flow rate.
2. Compare the TESTED flow rate to the MINIMUM flow rate information previously recorded. If the TESTED flow rate is equal to or greater than the MINIMUM flow rate recorded, the oil cooling system is functioning properly. Perform Code Recording Procedure. If the TESTED flow rate is less than the MINIMUM flow rate previously recorded, repeat the back flush and forward flush procedures.
3. If the TESTED flow rate is less than the MINIMUM flow rate after the second test, perform Code Recording Procedure. Replace the transmission oil cooler. Reconnect supply and waste hoses to the cooler lines in the normal flow direction. Perform Flow Test. Perform Code Recording Procedure.

Code Recording Procedure

1. Turn the main function switch to the CODE position.
2. Record TESTED flow rate, temperature, cycle and seven-character flow code information on repair order.

Clean-up

1. Turn the main function switch (2) to the IDLE position and allow the supply vessel pressure to dissipate.
2. Turn the main power switch (1) to the OFF position.
3. Disconnect the supply and waste hoses and the 12-volt power source from the vehicle.
4. Disconnect the air supply hose from J 45096: flush and flow test tool.
5. Dispose of the waste ATF in accordance with all applicable federal, state, and local requirements.

Bushing and Mating Shaft Inspection

Note. Proper bushing and corresponding mating shaft inspection should be performed before replacing the bushing, shaft, and in some cases, the component which houses the bushing. Thoroughly clean and dry the bushing and shaft surfaces before inspecting for damage.

Any of the following bushing conditions require replacement of the bushing and/or housing

1. Discoloration due to heat distress
2. Misalignment or displacement of bushing as a result of spinning in housing
3. Medium to heavy scoring that can be easily detected with fingernail. Light scoring is a normal condition.
4. Debris embedded into the bushing lining material
5. Obvious damage, including excessive and uneven wear
6. Excessive polishing. Minor polishing of the bushing is an indication of normal wear and does not require replacement.

Any of the following conditions require replacement of the bushing's mating shaft

1. Discoloration due to heat distress
2. Rough surface finish that can be easily detected with finger
3. Obvious shaft abnormalities, including warping or uneven surfaces
4. Obvious damage or cracking

Main Fluid Pump Pressure High or Low

Auxiliary Fluid Pump Pressure High or Low

Auxiliary Fluid Pump Performance Check

When checking a low auxiliary fluid pump pressure condition connect the Midtronic 165-PSC charger during testing in order to maintain sufficient battery voltage. A mechanical or electrical concern can cause a low auxiliary fluid pump pressure, or a noise condition. If the auxiliary fluid pump control module is not accurately controlling pump speed there will be a low pressure condition. The following conditions may cause an excessive auxiliary fluid noise condition

1. Mechanical fault within the auxiliary fluid pump.
2. Auxiliary fluid pump filter dislodged or restricted.
3. High resistance in the 3 phase circuits between the auxiliary fluid pump control module and the auxiliary fluid pump.
4. High resistance in the 3 phase circuits within the auxiliary fluid pump control module or the auxiliary fluid pump.

1. Ignition ON, command the auxiliary fluid pump speed to 50 percent with the scan tool. Attempt to maintain pump operation for at least 60 seconds.
2. Compare the auxiliary fluid pump actual and the auxiliary fluid pump commanded displays with the scan tool. The actual pump speed should be within 10 percent of the commanded speed. The pump should not make excessive noise or stall. If the reading is within 10 percent, inspect the auxiliary fluid pump filter for a dislodged or plugged condition. If the difference between actual and commanded speed is greater than 10 percent, the pump is noisy, or the pump stalls, test the 3 phase circuits between the auxiliary fluid pump control module and the auxiliary fluid pump for high resistance. If the circuits test normal, replace the auxiliary fluid pump control module and the auxiliary fluid pump.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Automatic Transmission Fluid Filter and Auxiliary Fluid Pump Filter Replacement»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-repair-instructions-on-vehicle)
2. «Auxiliary Fluid Pump and Gasket Replacement»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-repair-instructions-on-vehicle)
3. «Auxiliary Fluid Pump Control Module Replacement»(/cadillac/escalade/gmt900-2006-2014/remont/automatic-trans/#automatic-transmission-2ml70-repair-instructions-on-vehicle)

Automatic Transmission Fluid Leaks

General Method

1. Verify that the leak is transmission fluid.
2. Thoroughly clean the suspected leak area using a rag.
3. Operate the vehicle for 15-20 minutes under city driving conditions until normal operating temperatures are reached.
4. Park the vehicle over clean paper or cardboard.
5. Shut OFF the engine.
6. Look for fluid spots on the paper.
7. Make the necessary repairs.

Powder Method

1. Thoroughly clean the suspected leak area using a rag.
2. Apply an aerosol type leak tracing powder to the suspected leak area.
3. Operate the vehicle for 15-20 minutes under city driving conditions until normal operating temperatures are reached.
4. Shut OFF the engine.
5. Inspect the suspected leak area.
6. Trace the leak path through the powder in order to find the source of the leak.
7. Make the necessary repairs.

Dye and Black Light Method

A fluid dye and black light kit is available from various tool manufacturers.

1. Follow the manufacturer's instructions in order to determine the amount of dye to use.
2. Detect the leak with the black light.
3. Make the necessary repairs.

Find the Cause of the Leak

Pinpoint the leak and trace the leak back to the source. You must determine the cause of the leak in order to repair the leak properly. For example, if you replace a gasket, but the sealing flange is bent, the new gasket will not repair the leak. You must also repair the bent flange. Before you attempt to repair a leak, check for the following conditions, and make repairs as necessary

Gaskets

1. Fluid level/pressure is too high
2. Plugged vent or drain-back holes
3. Improperly tightened fasteners
4. Dirty or damaged threads
5. Warped flanges or sealing surface
6. Scratches, burrs, or other damage to the sealing surface
7. Damaged or worn gasket
8. Cracking or porosity of the component
9. Improper sealant used, where applicable
10. Incorrect gasket

Seals

1. Fluid level/pressure is too high
2. Plugged vent or drain-back holes
3. Damaged seal bore
4. Damaged or worn seal
5. Improper installation
6. Cracks in component
7. Manual or output shaft surface is scratched, nicked, or damaged
8. Loose or worn bearing causing excess seal wear

Possible Points of Fluid Leaks

Transmission Oil Pan

1. Incorrectly tightened oil pan bolts
2. Improperly installed or damaged oil pan gasket
3. Damaged oil pan or mounting face
4. Incorrect oil pan gasket
5. Incorrectly tightened or damaged drain plug

Case Leak

1. Damaged output speed sensor seal
2. Damaged manual shaft seal
3. Loose or damaged oil cooler connector fittings
4. Worn or damaged propeller shaft oil seal
5. Loose line pressure pipe plug
6. HV 3 Phase cable lug box
7. Porous casting warped dampener housing

Leak at the Dampener End

1. Dampener leak in the weld area
2. Dampener seal lip cut. Check the Dampener hub for damage
3. Dampener seal bushing moved forward and damaged
4. Dampener seal garter spring missing from the seal
5. Porous casting of the transmission case or the oil pump

Leak at the Vent Pipe

1. Overfilled system
2. Water or coolant in the fluid; The fluid will appear milky
3. Transmission case porous
4. Incorrect fluid level indicator
5. Plugged vent
6. Drain-back holes plugged
7. Mispositioned oil pump to case gasket, if equipped

Leak at the Case Extension

1. Output shaft seal assembly - located in the case
2. Output shaft seal assembly - located in the case extension

Scheme 62

Whine/Growl Noise That Changes with Vehicle Speed

Noise in First or Reverse Gear

Noise in First, Second, Third, Fourth, or Reverse Gear

Noise in First, Second, or Reverse Gear

Noise During 3-4 or 4-3 Shifts

Noise in Second or Fourth Gear

Noise in Fourth Gear

Vibration

Vibration in Second, Third, and Fourth Gear

Noise and Vibration Analysis

A noise or vibration that is noticeable when the vehicle is in motion MAY NOT be the result of the transmission.

If noise or vibration is noticeable in PARK and NEUTRAL with the engine at idle, but is less noticeable as RPM increases, the cause may be from poor engine performance.

1. Vibration may also be caused by a small amount of water inside the torque dampener.
2. Inspect the tires for the following conditions: Uneven wear Imbalance Mixed sizes Mixed radial and bias ply
3. Inspect the suspension components for the following conditions: Alignment wear or damage Loose fasteners Driveline damage or wear
4. Inspect the engine and transmission mounts for damage and loose bolts.
5. Inspect the transmission case mounting holes for the following conditions: Missing bolts, nuts, and studs Stripped threads Cracks
6. Inspect the flywheel for the following conditions: Missing or loose bolts Cracks Imbalance
7. Inspect the torque dampener for the following conditions: Missing or loose bolts or lugs Missing or loose balance weights Imbalance caused by heat distortion or fluid contamination

No Park or Drive

No Drive in All Ranges

No Reverse Gear

No Drive or Reverse Gear

Harsh Garage Shift

Harsh, Soft, Delayed or Slipping First or Reverse Gear

Harsh, Soft, Delayed or Slipping 1-2-3-4 Shift

Harsh, Soft, Delayed, or Slipping Reverse Gear

Shudder on Launch and/or Deceleration

No First Gear

No First and Reverse Gears

No First, Second, Third, or Fourth Gear

No Second Gear

No First, Second, or Reverse Gear

No Fourth Gear

Stuck in Second Gear

Stuck in First or Reverse Gear

See also:
• Diagnostic Starting Point - Vehicle
• Transmission General Description
• Transmission Component and System Description
• Testing for Intermittent Conditions and Poor Connections
• Diagnostic Repair Verification
• Output Speed Sensor Replacement
• Control Module References
• Special Tools
• Lifting and Jacking the Vehicle
• Hybrid Modes of Operation Description
• Fastener Caution
• Diagnostic System Check - Vehicle
• Strategy Based Diagnosis
• Diagnostic Procedure Instructions
• Automatic Transmission Controls Schematics
• Park - Engine Running
• Fluid Passages
• Transmission Indicators and Messages
• Transmission Fluid Level and Condition Check
• Main Fluid Pump Pressure High or Low
• Auxiliary Fluid Pump Pressure High or Low
• Automatic Transmission Fluid Leaks
• Fluid Leak Diagnosis
• Transmission Hot - Idle Engine
• Whine/Growl Noise That Changes with Vehicle Speed
• Noise in First or Reverse Gear
• Noise in First, Second, Third, Fourth, or Reverse Gear
• Noise in First, Second, or Reverse Gear
• Noise in Fourth Gear
• Vibration
• Noise and Vibration Analysis
• No Park or Drive
• No Drive in All Ranges
• No Reverse Gear
• No Drive or Reverse Gear
• Harsh Garage Shift
• Harsh, Soft, Delayed or Slipping First or Reverse Gear
• Harsh, Soft, Delayed or Slipping 1-2-3-4 Shift
• Harsh, Soft, Delayed, or Slipping Reverse Gear
• No First Gear
• No First and Reverse Gears
• No First, Second, Third, or Fourth Gear
• No First, Second, or Reverse Gear
• Stuck in First or Reverse Gear
• Road Test
• Line Pressure Check
• Engine Coolant/Water in Transmission
• Symptoms - Automatic Transmission