How to Diagnosis & Troubleshooting the Automatic Transaxle - 4t65-e - Service Buick LaCrosse I

Symptoms - Automatic Transmission

Symptoms - Automatic Transmission

Scheme 96

Circuit Description

The transmission internal mode switch (IMS) is a sliding contact switch attached to the selector detent inside the transmission side cover. The 4 inputs to the TCM indicate the position of the transmission range selector. The input voltage level at the TCM is high, B+, when the IMS is open and low when the switch is closed to ground. The 4 input parameters represented are Signals A, B, C and P, Parity. Refer to Transmission Internal Mode Switch Logic .

Test Description

The numbers below refer to the step numbers on the diagnostic table.

1. 2: HI values for all signals in all ranges indicates the ground circuit is OPEN.
2. 3: With the 20-way connector disconnected, all signals should indicate HI.
3. 5: If a circuit affects the other, this indicates a short between the 2 circuits.
4. 11: This step tests the internal transmission harness. If no fault is found in the harness, the fault will be in the switch.

Range Selector Displays Incorrect Range (3.6L)

Scheme 97

The transmission internal mode switch (IMS) is a sliding contact switch attached to the selector detent inside the transmission side cover. The 4 inputs to the PCM indicate the position of the transmission range selector. The input voltage level at the PCM is high, B+, when the IMS is open and low when the switch is closed to ground. The 4 input parameters represented are Signals A, B, C and P, Parity. Refer to Transmission Internal Mode Switch Logic .

The numbers below refer to the step numbers on the diagnostic table.

1. 2: HI values for all signals in all ranges indicates the ground circuit is OPEN.
2. 3: With the 20-way connector disconnected, all signals should indicate HI.
3. 5: If one circuit affects the other, this indicates a short between the two circuits.
4. 11: This step tests the internal transmission harness. If no fault is found in the harness, the fault will be in the switch.

Range Selector Displays Incorrect Range (3.8L)

Transmission Fluid Checking Procedure

Transmission Fluid Checking Procedure

Tools Required

J 21867 Pressure Gage

Procedure

1. Install a scan tool.
2. Start the engine and set the parking brake.
3. Check for a stored Diagnostic Trouble Code (DTC).
4. Repair the vehicle, if necessary.
5. Check the fluid level. Refer to the «Transmission Fluid Checking Procedure»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#how-to-diagnosis-troubleshooting-the-automatic-transaxle-4t65-e-service__transmission-fluid-checking-procedure) .
6. Check the manual linkage for proper adjustment.
7. Turn the engine Off. Remove the oil pressure test hole plug and install the J 21867 .
8. Put the gear selector in PARK range and set the parking brake.
9. Start the engine and allow the engine to warm up at idle.
10. Access the PC solenoid valve control test on the scan tool.
11. Increase the PC solenoid actual current from 0 to 1 amps in 0.1 amp increments. Allow the pressure to stabilize for five seconds after each pressure change. Read the corresponding line pressure on the J 21867 .
12. Refer to the «Line Pressure»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__line-pressure) specification table. Compare the data to the table.
13. If pressure readings differ greatly from the table, refer to «Incorrect Line Pressure»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#how-to-diagnosis-troubleshooting-the-automatic-transaxle-4t65-e-service__incorrect-line-pressure) .
14. Shut the engine OFF. Remove the J 21867 .
15. Apply sealant GM P/N 12345382 (Canadian P/N 1095348) to the oil pressure test hole plug.
16. Install the oil pressure test hole plug. Tighten: Tighten the plug to 12 N.m (106 lb in).

Road Test Procedure

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 and Torque Converter Clutch (TCC) Apply
3. Part Throttle Detent Downshifts
4. Full Throttle Detent Downshifts
5. Manual Downshifts
6. Coasting Downshifts
7. Manual Gear Range Selection REVERSE Manual FIRST Manual SECOND Manual THIRD

Before the road test, ensure the following

1. The engine is performing properly.
2. Transmission fluid level is correct. Refer to the «Transmission Fluid Checking Procedure»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#how-to-diagnosis-troubleshooting-the-automatic-transaxle-4t65-e-service__transmission-fluid-checking-procedure) .
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. Transmission fluid level. Refer to the «Transmission Fluid Checking Procedure»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#how-to-diagnosis-troubleshooting-the-automatic-transaxle-4t65-e-service__transmission-fluid-checking-procedure) .
2. Diagnostic Trouble Codes (DTCs) that may have set during the testing. Refer to the applicable DTC.
3. Scan tool data for any abnormal readings or data.

Electrical Function Check

Perform this check first, in order to ensure the electronic transmission components are connected and functioning properly. If these components are not checked, a simple electrical condition could be mis-diagnosed.

1. Connect the scan tool.
2. Ensure the gear selector is in PARK and set the parking brake.
3. Start the engine.
4. Verify that the following scan tool data can be obtained and is functioning properly. Refer to «Scan Tool Data List (3.6L)»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-1-of-2__scan-tool-data-list-36l) or «Scan Tool Data List (3.8L)»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-1-of-2__scan-tool-data-list-38l) for typical data values. Data that is questionable may indicate a concern. Engine Speed Transmission input speed (turbine) Transmission output speed Vehicle speed TFP manual valve position switch Transmission range Commanded gear (current gear) PC solenoid reference current PC solenoid actual current PC solenoid duty cycle Engine coolant temperature Transmission fluid temperature Throttle angle Ignition voltage 1-2 shift solenoid 2-3 shift solenoid TCC solenoid duty cycle TCC slip speed
5. Monitor the brake switch signal with the Tech II. Using the Tech II, activate and deactivate TCC.
6. Check the garage shifts. Apply the brake pedal and ensure the parking brake is set. Move the gear selector through the following ranges: PARK to REVERSE REVERSE to NEUTRAL NEUTRAL to DRIVE Pause 2 to 3 seconds in each gear position. Verify the gear engagements are immediate and not harsh.
7. Monitor transmission range on the scan tool. 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.
8. Check throttle angle input. Apply the brake pedal and ensure the parking brake is set. Ensure the gear selector is in PARK. Monitor throttle angle while increasing and decreasing engine speed with the throttle pedal. The scan tool throttle angle 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 and Torque Converter Clutch (TCC) Apply

The PCM/TCM calculates the upshift points based primarily on two inputs: throttle angle and vehicle speed. When the PCM/TCM determines that conditions are met for a shift to occur, the PCM/TCM commands the shift by closing or opening the ground circuit for the appropriate solenoid.

Perform the following steps

1. Refer to the «Shift Speed»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__shift-speed) table and choose a throttle position of 12 percent, 25 percent or 50 percent. All throttle angles shown should be tested to cover the normal driving range.
2. Monitor the following scan tool parameters: Throttle angle Vehicle speed Engine speed Commanded gear Slip speed Solenoid states
3. Place the gear selector in the OVERDRIVE position.
4. Accelerate the vehicle using the chosen throttle angle. Hold the throttle steady.
5. As the transmission upshifts, note the vehicle speed when the shift occurs for each gear change. There should be a noticeable shift feel or engine speed change within 1 to 2 seconds of the commanded gear change.
6. Compare the shift speeds to the Shift Speed table. Refer to «Shift Speed»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__shift-speed) . Shift speeds may vary slightly due to transmission fluid temperature or hydraulic delays in responding to electronic controls. Note any harsh, soft or delayed shifts or slipping. Note any noise or vibration.
7. Repeat steps 1 through 6 to complete all throttle angles.
8. Check for TCC apply in THIRD and FOURTH gear. Note the TCC apply point. When the TCC applies there should be a noticeable drop in engine speed and a drop in slip speed to below 100 RPM. If the TCC apply can not be detected: Check for DTCs Refer to «Torque Converter Diagnosis Procedure»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#how-to-diagnosis-troubleshooting-the-automatic-transaxle-4t65-e-service__torque-converter-diagnosis-procedure) Refer to the «Shift Speed»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__shift-speed) table for the correct TCC apply speeds. Use the Tech II to apply and release TCC.

Part Throttle Detent Downshift

1. Place the gear selector in the OVERDRIVE position.
2. Accelerate the vehicle to 64-88 km/h (40-55 mph) in FOURTH gear.
3. Quickly increase throttle angle to greater than 50 percent.
4. Verify the following: The TCC releases The transmission downshifts immediately to THIRD gear

Full Throttle Detent Downshift

1. Place the gear selector in the OVERDRIVE position.
2. Accelerate the vehicle to speeds of 64-88 km/h (40-55 mph) in FOURTH gear.
3. Quickly increase throttle angle to 100 percent (WOT).
4. Verify the following: The TCC releases The transmission downshifts immediately to SECOND gear

Manual Downshifts

The shift solenoid valves do not control the 4-3 manual downshift. The 4-3 manual downshift is hydraulic. The 3-2 and 2-1 manual downshifts are electronic. The solenoid states will change during or shortly after a 4-3 downshift is selected.

Manual 4-3 Downshift

1. Place the gear selector in the OVERDRIVE position.
2. Accelerate the vehicle to 64-88 km/h (40-55 mph) in FOURTH gear.
3. Release the throttle while moving the gear selector to THIRD.
4. Verify the following: The TCC releases The transmission downshifts immediately to THIRD gear The engine slows the vehicle

Manual 4-2 Downshift

1. Place the gear selector in the OVERDRIVE position.
2. Accelerate the vehicle to 64-72 km/h (40-45 mph).
3. Release the throttle while moving the gear selector to SECOND.
4. Verify the following: The TCC releases The transmission downshifts immediately to SECOND gear The engine slows the vehicle

Manual 4-1 Downshift

1. Place the gear selector in the OVERDRIVE position.
2. Accelerate the vehicle to 64 km/h (40 mph).
3. Release the throttle while moving the gear selector to FIRST.
4. Verify the following: The TCC releases The transmission downshifts immediately to SECOND Gear. The engine slows the vehicle. The transmission downshifts to FIRST gear at the calibrated speed, typically 48-64 km/h (30-40 mph).

Coasting Downshifts

1. Place the gear selector in the OVERDRIVE position.
2. Accelerate the vehicle to FOURTH gear with the TCC applied.
3. Release the throttle and lightly apply the brakes.
4. Verify the following: The TCC releases Downshifts occur at speeds shown in the Shift Speed table. Refer to «Shift Speed»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__shift-speed) .

Manual Gear Range Selection

The shift solenoids control the upshifts in the manual gear ranges.

Perform the following tests using 10-15 percent throttle angle.

Reverse

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.

Manual First

1. With the vehicle stopped, move the gear selector to FIRST.
2. Accelerate the vehicle to 32 km/h (20 mph).
3. Verify the following: No upshifts occur The TCC does not apply There is no noticeable slip, noise or vibration

Manual Second

1. With the vehicle stopped, move the gear selector to SECOND.
2. Accelerate the vehicle to 57 km/h (35 mph).
3. Verify the following: The 1-2 shift occurs The 2-3 shift does not occur There is no noticeable slip, noise or vibration

Manual Third

1. With the vehicle stopped, move the gear selector to THIRD.
2. Accelerate the vehicle to 64 km/h (40 mph).
3. Verify the following: The 1-2 shift occurs The 2-3 shift occurs There is no noticeable slip, noise or vibration

Torque Converter Diagnosis Procedure

The torque converter clutch (TCC) is applied by fluid pressure, which is controlled by a PWM solenoid valve. This solenoid valve is located inside of the automatic transmission assembly. The solenoid valve is controlled through a combination of computer controlled switches and sensors.

Torque Converter Stator

The torque converter stator roller clutch can have two different malfunctions.

1. The stator assembly freewheels in both directions.
2. The stator assembly remains locked up at all times.

Poor Acceleration at Low Speed

If the stator is freewheeling at all times, the car tends to have poor acceleration from a standstill. At speeds above 50-55 km/h (30-35 mph), the car may act normally. For poor acceleration, you should first determine that the exhaust system is not blocked and the transmission is in First gear when starting out.

If the engine freely accelerates to high RPM in NEUTRAL, you can assume that the engine and the exhaust system are normal. Check for poor performance in DRIVE and REVERSE to help determine if the stator is freewheeling at all times.

Poor Acceleration at High Speed

If the stator is locked up at all times, performance is normal when accelerating from a standstill. Engine RPM and car speed are limited or restricted at high speeds. Visual examination of the converter may reveal a blue color from overheating.

If the converter has been removed, you can check the stator roller clutch by inserting a finger into the splined inner race of the roller clutch and trying to turn the race in both directions. You should be able to freely turn the inner race clockwise, but you should have difficulty in moving the inner race counterclockwise or you may be unable to move the race at all.

Noise

You may notice a torque converter whine when the vehicle is stopped and the transmission is in DRIVE or REVERSE. This noise will increase as you increase the engine RPM. The noise will stop when the vehicle is moving or when you apply the torque converter clutch, because both halves of the converter are turning at the same speed.

Perform a stall test to make sure the noise is actually coming from the converter

1. Place your foot on the brake.
2. Put the gear selector in DRIVE.
3. Depress the accelerator to approximately 1,200 RPM for no more than 6 seconds.

A torque converter noise will increase under this load.

Torque Converter Clutch Shudder

The key to diagnosing torque converter clutch (TCC) shudder is to note when it happens and under what conditions.

TCC shudder which is caused by the transmission should only occur during the apply or the release of the converter clutch. Shudder should never occur after the TCC plate is fully applied.

If the shudder occurs while the TCC is applying, the problem can be within the transmission or the torque converter. Something is causing one of the following conditions to occur

1. Something is not allowing the clutch to become fully engaged.
2. Something is not allowing the clutch to release.
3. The clutch is releasing and applying at the same time.

One of the following conditions may be causing the problem to occur

1. Leaking turbine shaft seals
2. A restricted release orifice
3. A distorted clutch or housing surface due to long converter bolts
4. Defective friction material on the TCC plate

If Shudder Occurs After TCC has Applied

If shudder occurs after the TCC has applied, most of the time there is nothing wrong with the transmission.

As mentioned above, the TCC is not likely to slip after the TCC has been applied. Engine problems may go unnoticed under light throttle and load, but they become noticeable after the TCC apply when going up a hill or accelerating. This is due to the mechanical coupling between the engine and the transmission.

Once TCC is applied, there is no torque converter (fluid coupling) assistance. Engine or driveline vibrations could be unnoticeable before TCC engagement.

Inspect the following components in order to avoid misdiagnosis of TCC shudder. An inspection will also avoid the unnecessary disassembly of a transmission or the unnecessary replacement of a torque converter.

1. Spark plugs - Inspect for cracks, high resistance or a broken insulator.
2. Plug wires - Look in each end. If there is red dust (ozone) or a black substance (carbon) present, then the wires are bad. Also look for a white discoloration of the wire. This indicates arcing during hard acceleration.
3. Coil-Look for a black discoloration on the bottom of the coil. This indicates arcing while the engine is misfiring.
4. Fuel injector - The filter may be plugged.
5. Vacuum leak - The engine will not get a correct amount of fuel. The mixture may run rich or lean depending on where the leak occurs.
6. EGR valve - The valve may let in too much or too little unburnable exhaust gas and could cause the engine to run rich or lean.
7. MAP/MAF sensor - Like a vacuum leak, the engine will not get the correct amount of fuel for proper engine operation.
8. Carbon on the intake valves - Carbon restricts the proper flow of air/fuel mixture into the cylinders.
9. Flat cam - Valves do not open enough to let the proper fuel/air mixture into the cylinders.
10. Oxygen sensor - This sensor may command the engine too rich or too lean for too long.
11. Fuel pressure - This may be too low.
12. Engine mounts - Vibration of the mounts can be multiplied by TCC engagement.
13. Axle joints - Check for vibration.
14. TP Sensor - The TCC apply and release depends on the TP Sensor in many engines. If the TP Sensor is out of specification, TCC may remain applied during initial engine loading.
15. Cylinder balance - Bad piston rings or poorly sealing valves can cause low power in a cylinder.
16. Fuel contamination - This causes poor engine performance.

Torque Converter Evaluation and Diagnosis

Replace the torque converter if any of the following conditions exist

1. External leaks appear in the hub weld area.
2. The converter hub is scored or damaged.
3. The converter pilot is broken, damaged or fits poorly into the crankshaft.
4. You discover steel particles after flushing the cooler and the cooler lines.
5. The pump is damaged or you discover steel particles in the converter.
6. The vehicle has TCC shudder and/or no TCC apply. Replace the torque converter only after all hydraulic and electrical diagnoses have been made. The converter clutch material may be glazed.
7. The converter has an imbalance which cannot be corrected. Refer to «Flexplate/Torque Converter Vibration Test»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#how-to-diagnosis-troubleshooting-the-automatic-transaxle-4t65-e-service) .
8. The converter is contaminated with engine coolant which contains antifreeze.
9. An internal failure occurs in the stator roller clutch.
10. You notice excessive end play.
11. Overheating produces heavy debris in the clutch.
12. You discover steel particles or clutch lining material in the fluid filter or on the magnet, when no internal parts in the unit are worn or damaged. This condition indicates that lining material came from the converter.

Do not replace the torque converter if you discover any of the following symptoms

1. The oil has an odor or the oil is discolored, if there are no metal or clutch facing particles present.
2. The threads in one or more of the converter bolt holes are damaged. Correct the condition with a new thread insert.
3. Transmission failure did not display evidence of damaged or worn internal parts, steel particles or clutch plate lining material in the unit and inside the fluid filter.
4. The vehicle has been exposed to high mileage only. An exception may exist where the lining of the torque converter clutch dampener plate has seen excess wear by vehicles operated in heavy and/or constant traffic, such as taxi, delivery or police use.

Torque Converter Replacement Guide

Torque Converter Replacement Guide

Isolating Vibration

Note. Some engine/transaxle combinations cannot be balanced in this manner due to restricted access or limited clearances between the torque converter bolts and the engine. Ensure that the bolts do not bottom out in the lug nuts or the torque converter cover which could dent and cause internal damage.

To isolate and correct a flywheel or torque converter vibration, separate the torque converter from the flywheel to determine if vibration is in the engine or transmission.

1. With the engine at idle speed and the transmission in PARK or NEUTRAL, observe the vibration.
2. Turn the engine OFF.
3. Raise and suitably support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/lacrosse/i-2004-2009/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
4. Remove the transmission converter cover bolts and the cover. Refer to «Torque Converter Cover Replacement»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2) .
5. Mark the relationship of the converter to the flywheel.
6. Remove the bolts attaching the converter to the flywheel. Refer to «Flywheel to Torque Converter Bolt Replacement»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2) .
7. Slide the torque converter away from the flywheel.
8. Rotate the flywheel and torque converter to inspect for defects or missing balance weights. Refer to «Engine Flywheel Cleaning and Inspection»(/buick/lacrosse/i-2004-2009/remont/mechanical/#engine-mechanical-36l-ly7-repair-instructions-3-of-5) in Engine Mechanical - 3.6L or «Engine Flywheel Cleaning and Inspection»(/buick/lacrosse/i-2004-2009/remont/mechanical/#engine-mechanical-38l__engine-flywheel-cleaning-inspection) in Engine Mechanical - 3.8L.
9. Lower the vehicle.
10. With the engine at idle speed and the transmission in PARK or NEUTRAL, observe the vibration. Refer to «Vibration Analysis - Engine»(/buick/lacrosse/i-2004-2009/remont/oem-general-information/#vibration-symptoms-diagnosis-and-correction) in Vibration Diagnosis and Correction.
11. Turn the engine OFF.

Indexing Torque Converter

To determine and correct a torque converter vibration, the following procedure may have to be performed several times to achieve the best possible torque converter to flywheel balance.

1. Raise and suitably support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/lacrosse/i-2004-2009/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
2. Rotate the torque converter one bolt position.
3. Align the torque converter hub (2) in the engine crankshaft (3) and install the torque converter to flywheel bolts. Refer to «Flywheel to Torque Converter Bolt Replacement»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2) .
4. Lower the vehicle.
5. With the engine at idle speed and the transmission in PARK or NEUTRAL, observe the vibration. Refer to «Noise and Vibration Analysis»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#how-to-diagnosis-troubleshooting-the-automatic-transaxle-4t65-e-service__noise-and-vibration-analysis) . Repeat this procedure until you obtain the best possible balance.
6. Install the transmission converter cover bolts and the cover. Refer to «Torque Converter Cover Replacement»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2) .

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 converter.
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 converter for the following conditions: Missing or loose bolts or lugs Missing or loose balance weights Imbalance caused by heat distortion or fluid contamination

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

Note. The antifreeze or water will deteriorate the seals, gaskets and the glue that bonds the clutch material to the pressure plate. Both conditions may cause damage to the 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 converter.
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.

General Method

1. Verify that the leak is transmission fluid.
2. Thoroughly clean the suspected leak area.
3. Operate the vehicle for 24 km (15 mi) or 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 with solvent.
2. Apply an aerosol type powder, such as foot powder, to the suspected leak area.
3. Operate the vehicle for 24 km (15 mi) or 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 & 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

Scheme 98

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

Case Leak

1. Damaged or missing fill tube seal
2. Mislocated fill tube bracket
3. Damaged vehicle speed sensor seal
4. Damaged manual shaft seal
5. Loose or damaged oil cooler connector fittings
6. Worn or damaged propeller shaft oil seal
7. Loose line pressure pipe plug
8. Warped
9. Distorted torque converter housing
10. Porous casting

Leak at the Torque Converter End

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

Leak at the Vent Pipe or the Fluid Fill Tube

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

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 3 hours before starting the engine.
5. Repeat the fluid leak diagnosis procedures.

J 44246 Solenoid Testing Kit. See Special Tools .

Leak Test Procedure

1. Remove the solenoid from the control valve body. Refer to «1-2 Shift Solenoid Valve Replacement»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2) or «2-3 Shift Solenoid Valve Replacement»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2) .
2. Install the 1-2, 3-4 or the 2-3 shift solenoid valve into bore number 2 of the J 44246 and install the factory retainer clip to retain the solenoid. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) .
3. Connect the solenoid testing harness supplied with the J 44246 to the solenoid. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) .
4. Apply compressed air to the J 44246 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) .
5. Air should flow through the solenoid. If air does not flow through the solenoid, replace the solenoid.
6. Connect the solenoid testing harness to the (12 volt) positive and negative (-) battery terminals.
7. Observe if the solenoid is operating electrically. An audible clicking noise can be heard when connecting or disconnecting power.
8. Observe the air flow through the solenoid. The flow will completely or nearly completely stop. Replace the solenoid if there continues to be an obvious air leak when the solenoid is energized.
9. Install the solenoid into the control valve body. Refer to «1-2 Shift Solenoid Valve Replacement»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2) or «2-3 Shift Solenoid Valve Replacement»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2) .

Automatic Transmission Oil Cooler Flushing and Flow Test (J35944-A)

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 wear-out. 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.

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 are as follows

1. J 35944-A Transmission Oil Cooler and Line Flusher. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) .
2. J 35944-22 Transmission Oil Cooler Flushing Fluid. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) .
3. Measuring cup
4. Funnel
5. Water supply - hot water recommended
6. Water hose, at least 16 mm (5/8 in) ID
7. Shop air supply with water/oil filters, regulator and pressure gage
8. Air chuck with clip, if available
9. Oil drain container
10. Pail with lid - 19 L (5 gallon)
11. Eye protection
12. Rubber gloves

Preparation

1. During the installation of the repaired or replacement transmission, do not connect the oil cooler pipes.
2. Remove the fill cap (9) on the J 35944-A and fill the flusher tank (4) with 0. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) .6 L (20-21 oz.) of J 35944-22 , using the measuring cup (6). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) . Do not overfill.
3. Install the fill cap (9) on the J 35944-A and pressurize the flusher tank (4) to 550-700 kPa (80-100 psi), using the shop air supply at the tank air valve (2). See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) .
4. With the water supply valve (1) on the J 35944-A in the OFF position, connect the water supply hose from the J 35944-A to the water supply at the faucet. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) .
5. Turn ON the water supply at the faucet.

Cooler Flow Check and Flushing Steps

1. Tools Required
2. Preparation
3. Back Flush
4. Forward Flush
5. Flow Check
6. Clean-up

Back Flush

1. Inspect the transmission oil cooler pipes for kinks or damage. Repair as necessary.
2. Connect the J 35944-A to the oil cooler feed top connector. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) .
3. Clip the discharge hose (2) onto the oil drain container.
4. Attach the J 35944-A to the undercarriage of the vehicle with the hook provided and connect the flushing system feed supply hose (1) from the J 35944-A to the bottom connector oil cooler return pipe. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) .
5. Turn the J 35944-A water supply valve (3) to the ON position and allow water to flow through the oil cooler and pipes for 10 seconds to remove any remaining transmission fluid. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) . If water does not flow through the oil cooler and pipes, the cause of the blockage must be diagnosed and the plugged component must be repaired or replaced. Continue with the cooler flushing and flow check procedure once the blockage is corrected.
6. Turn the J 35944-A water supply valve (3) to the OFF position and clip the discharge hose onto a 19 liter (5 gallon) pail with a lid, to avoid splashback. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) .
7. Turn the J 35944-A water supply valve (3) to the ON position and depress the trigger (1) to mix cooler flushing solution into the water flow. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) . Use the clip provided on the handle to hold the trigger (1) down. The discharge will foam vigorously when the solution is introduced into the water stream.
8. Flush the oil cooler and pipes with water and solution for 2 minutes. During this flush, attach the shop air supply 825 kPa (120 psi) to the flushing system feed air valve (2) located on the J 35944-A , for 3-5 seconds at the end of every 15-20 second interval to create a surging action. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) .
9. Release the trigger (1) and turn the J 35944-A water supply valve (3) to the OFF position. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) .

Forward Flush

1. Disconnect both hoses (1 and 2) from the oil cooler pipes and connect them to the opposite oil cooler pipe. This will allow the oil cooler and pipes to be flushed in the normal flow direction.
2. Repeat Step 6 and 7 of the Back Flush.
3. Release the trigger (1) of the J 35944-A and allow water only to rinse the oil cooler and pipes for 1 minute. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) .
4. Turn the J 35944-A water supply valve (3) to the OFF position and turn OFF the water supply at the faucet. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) .
5. Attach the shop air supply to the flushing system feed air valve (2) on the and J 35944-A blow out the water from the oil cooler and pipes. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) . Continue, until no water comes out of the discharge hose.

Flow Test

1. Disconnect the hose from the oil cooler pipe. Connect the oil cooler feed pipe, top connector, to the transmission for normal flow.
2. Clip the discharge hose (1) to an empty oil container.
3. Confirm the transmission is filled with automatic transmission fluid. Refer to «Fluid Capacity Specifications»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__fluid-capacity-specifications) for the correct automatic transmission fluid capacity.
4. Start the engine with the transmission in PARK range and run for 30 seconds after fluid begins to flow from the discharge hose (1). A minimum of 1.9 L (2 quarts) must be discharged during this 30 second run time.
5. If the fluid flow meets or exceeds 1.9 L (2 quarts) in 30 seconds, connect the oil cooler feed pipe to the front connector on the transmission.
6. If fluid flow is less than 1.9 L (2 qt) in 30 seconds, perform the following diagnosis: Disconnect the J 35944-A discharge hose (1) from the oil cooler return pipe. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) . Disconnect the oil cooler feed pipe at the radiator. Connect the J 35944-A discharge hose (1) to the oil cooler feed pipe, radiator end. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) . Clip the discharge hose (1) onto the oil drain container. Start the engine with the transmission in PARK range and run for 30 seconds after fluid begins to flow from the discharge hose (1). A minimum of 1.9 L (2 qt) must be discharged during this 30 second run time.
7. If the amount of transmission fluid flow remains less than 1.9 L (2 qt) in 30 seconds, inspect the oil cooler feed pipe, top connector, for restrictions or damage. If no condition is found with the feed pipe, inspect the transmission.

Clean-up

1. Disconnect the water supply hose from the J 35944-A and bleed any remaining air pressure from the flusher tank. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) .
2. Remove the fill cap from the J 35944-A and return any unused flushing solution to its container. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) . Rinse the J 35944-A with water. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) . Do not store the J 35944-A with flushing solution in it. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) .
3. After every third use, clean the J 35944-A as described in the instructions included with the tool. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) .
4. Dispose of any waste water/solution and transmission fluid in accordance with local regulations.

Automatic Transmission Oil Cooler Flushing and Flow Test (J45096)

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.

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

1. J 45096 Transmission Oil Cooling System Flush and Flow Test Tool. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) .
2. Shop air supply with water/oil filters, regulator and pressure gage - minimum 90 psi
3. Eye protection
4. Rubber gloves

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

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 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. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) .
4. Turn the main power switch to the ON position.
5. Fill the supply tank with Dexron®VI/Mercon® or equivalent, 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 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) .
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 information procedures.

Minimum Flow Rate in Gallons Per Minute (GPM)

Back Flush Procedure

1. Connect the J 45096 adapters (1) to the vehicle's transmission oil cooler supply and return lines at the transmission. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) .
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.

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.

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.

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. Note: A small amount of water may drain from the bottom of the unit when the air supply is disconnected. This is a normal operation of the built-in water separator.
4. Disconnect the air supply hose from J 45096 . See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/automatic-trans/#automatic-transaxle-4t65-e-introduction-2-of-2__special-tools) .
5. Dispose of the waste ATF in accordance with all applicable federal, state and local requirements.

Automatic Transmission Fluid Leaks

Automatic Transmission Fluid Leaks

Incorrect Line Pressure

Incorrect Line Pressure

Delayed Park to Reverse/Drive Engagement

Delayed Park to Reverse/Drive Engagement

Harsh Park to Reverse/Drive Engagement

Harsh Park to Reverse/Drive Engagement

Slips in Drive or No Drive

Slips in Drive or No Drive

Slips in Reverse or No Reverse

Slips in Reverse or No Reverse

Locked Up in Drive/Reverse

Locked up in Drive/Reverse

No Park Range

No Park Range

Harsh or Soft 1-2 Shift Feel

Harsh or Soft 1-2 Shift Feel

Harsh or Soft 2-3/3-2 Shift Feel

Harsh or Soft 2-3/3-2 Shift Feel

Harsh or Soft 3-4/4-3 Shift Feel

Harsh or Soft 3-4/4-3 Shift Feel

High or Low Upshift or Downshift Speed

High or Low Upshift or Downshift Speed

First and Second Gear Only (2-3 Solenoid Stuck On)

First and Second Gear Only (2-3 Solenoid Stuck On)

First and Fourth Gear Only (1-2 Solenoid Stuck On)

First and Fourth Gear Only (1-2 Solenoid Stuck On)

Second and Third Gear Only (1-2 Solenoid Stuck Off)

Second and Third Gear Only (1-2 Solenoid Stuck Off)

Third and Fourth Gear Only (2-3 Solenoid Stuck Off)

Third and Fourth Gear Only (2-3 Solenoid Stuck Off)

First Gear Only

First Gear Only

Second Gear Only

Second Gear Only

Third Gear Only

Third Gear Only

Fourth Gear Only

Fourth Gear Only

Slipping or No First Gear

Slipping or No First Gear

Slipping or No Second Gear

Slipping or No Second Gear

Slipping or No Third Gear

Slipping or No Third Gear

Slipping or No Fourth Gear

Slipping or No Fourth Gear

No Engine Braking in Manual Second or Low Range

No Engine Braking in Manual Second or Low Range

Whine Noise Varying with RPM or Fluid Pressure

Whine Noise Varying with RPM or Fluid Pressure

Popping Noise

Popping Noise

Buzz Noise or High Frequency Rattle Sound

Buzz Noise or High Frequency Rattle Sound

Whine/Growl Noise That Changes with Vehicle Speed

Whine/Growl Noise That Changes with Vehicle Speed

Final Drive Noise or Hum Noise

Final Drive Noise or Hum Noise

Noise in First, Second, Third or Fourth

Noise in First, Second, Third or Fourth

Noise in Random Ranges

Noise in Random Ranges

Abnormal Noise in Park or Neutral Range

Abnormal Noise in Park or Neutral Range

Converter Clutch Stuck On in All Gears

TCC Stuck On in All Gears

Converter Clutch Stuck On in Second, Third and Fourth Gear

Converter Clutch Stuck On in 2nd, 3rd and 4th Gear

Harsh Torque Converter Clutch (TCC) Apply or Release

Harsh TCC Apply or Release

Converter Clutch Apply Rough, Slips or Shudders

Soft TCC Apply (Shudder)

No Torque Converter Clutch (TCC) Apply

No TCC Apply

See also:
• Transmission Internal Mode Switch Logic
• Testing for Intermittent Conditions and Poor Connections
• Special Tools
• Automatic Transmission Inline 20-Way Connector End View (3.6L)
• Testing for Short to Ground
• Wiring Repairs
• Testing for Continuity
• Circuit Testing
• Wiring Harness Replacement
• Control Module References
• Line Pressure
• FASTENER NOTICE
• Scan Tool Data List (3.6L)
• Scan Tool Data List (3.8L)
• Shift Speed
• Symptoms - Engine Controls
• DTC P0741 (3.6L)
• DTC P1887 (3.8L)
• Symptoms - Engine Mechanical
• Vibration Analysis - Engine
• Lifting and Jacking the Vehicle
• Engine Flywheel Cleaning and Inspection
• Engine Flywheel Cleaning and Inspection
• Fluid Capacity Specifications
• Range Reference
• Transmission Fluid Checking Procedure
• Incorrect Line Pressure
• Automatic Transmission Fluid Leaks
• Fluid Leak Diagnosis
• Whine Noise Varying with RPM or Fluid Pressure
• Popping Noise
• Buzz Noise or High Frequency Rattle Sound
• Whine/Growl Noise That Changes with Vehicle Speed
• Final Drive Noise or Hum Noise
• Noise in First, Second, Third or Fourth
• Noise in Random Ranges
• Abnormal Noise in Park or Neutral Range
• Torque Converter Diagnosis Procedure
• Noise and Vibration Analysis
• No Park Range
• Slips in Reverse or No Reverse
• Slips in Drive or No Drive
• Locked Up in Drive/Reverse
• No Engine Braking in Manual Second or Low Range
• Harsh or Soft 1-2 Shift Feel
• Harsh or Soft 2-3/3-2 Shift Feel
• Harsh or Soft 3-4/4-3 Shift Feel
• Harsh Park to Reverse/Drive Engagement
• Delayed Park to Reverse/Drive Engagement
• Slipping or No First Gear
• Slipping or No Second Gear
• Slipping or No Third Gear
• Slipping or No Fourth Gear
• First Gear Only
• Second Gear Only
• Third Gear Only
• Fourth Gear Only
• First and Second Gear Only (2-3 Solenoid Stuck On)
• First and Fourth Gear Only (1-2 Solenoid Stuck On)
• Second and Third Gear Only (1-2 Solenoid Stuck Off)
• Third and Fourth Gear Only (2-3 Solenoid Stuck Off)
• High or Low Upshift or Downshift Speed
• No Torque Converter Clutch (TCC) Apply
• Converter Clutch Stuck On in All Gears
• Converter Clutch Stuck On in Second, Third and Fourth Gear
• Harsh Torque Converter Clutch (TCC) Apply or Release
• Converter Clutch Apply Rough, Slips or Shudders
• Road Test Procedure
• Automatic Transmission Oil Cooler Flushing and Flow Test (J35944-A)
• Symptoms - Automatic Transmission