Automatic Transmission Fluid and Filter Replacement Remove

Tools Required

Whenever you remove a transmission for service, do a transmission oil cooler flushing. It is essential to flush the oil cooler under the following conditions:

1. Remove the fill cap on the J 35944-A .
2. Fill the can with 0.6 liter (20-21 ounces) of J 35944-22 , or equivalent, cooler flushing fluid. Do not overfill. If you overfill, the tool will need recharging with air before the backflush.
3. Follow the manufacturer's suggested procedures for proper handling of the solution.

Important: Shop air supply must not exceed 825 kPa (120 psi), and must be equipped with a water/oil filter.

4. Secure the fill cap, and pressurize the flusher can with shop air to 550-700 kPa (80-100 psi).
5. Connect the J 35944-A to the transmission end of the transmission cooler pipe that feeds the bottom fitting of the oil cooler.
6. Connect the discharge hose to the top oil cooler pipe.
7. Clip the discharge hose to the oil drain container.
8. With the water valve on the tool in the OFF position, connect the water hose from the water supply to the tool.
9. Turn ON the water supply at the faucet.

Important: If water does not flow through the cooler the system is completely plugged. Do not complete the flushing procedure. Replace the cooler and/or the cooler pipes as required.

1. Switch the water valve on the tool to the ON position. Allow the water to flow through the oil cooler for 10 seconds in order to remove the transmission fluid in the system.
2. Switch the water valve on the tool to the OFF position. Clip the discharge hose onto a 5  gallon pail with a lid. If no lid is available, place a shop towel over the end of the hose in order to prevent splash. The discharge will foam vigorously when you introduce solution into the water stream.
3. Switch the water valve on the tool to the ON position. Depress the trigger that mixes the flushing solution into the water flow. Use the bale clip on the handle in order to hold down the trigger.
4. Flush the oil cooler with water and solution for 2  minutes. During the flush, attach the air supply to the air valve on the tool for 3-5  seconds after every 15-20  second interval in order to create a surging action.
5. Release the trigger. Switch the water valve on the tool to the OFF position.
6. Disconnect both hoses from the oil cooler pipes.

1. Connect the hoses to the oil cooler pipes in order to perform a backflush.
2. Switch water valve on the tool to the ON position. Depress the trigger in order to mix the flushing solution with the water flow. Use the bale clip on the handle to hold down the trigger.
3. Flush the oil cooler with water and solution for 2  minutes. During this flush, attach the air supply to the air valve on the tool for 3-5  seconds after each 15-20  second interval in order to create a surging action.
4. Release the trigger. Allow water only to rinse the oil cooler for 1 minute.
5. Turn the water supply OFF at the faucet.
6. Attach the air supply to the air valve on the tool. Dry out the system with air for at least 2  minutes. Dry out the system longer than 2  minutes, if moisture from the oil cooler line discharge hose is visible.
7. Connect the cooler feed pipe to the transmission. The cooler feed is the bottom connection at the transmission.
8. If not already connected, attach the discharge hose to the cooler return pipe. Place the hose into an appropriate drain container.
9. After filling the transmission with DEXRON®-III or DEXRON®-IIE automatic transmission fluid, or equivalent, start the engine. Run the engine for 30 seconds. This removes any residual moisture from the oil cooler and the cooler pipes, protects all the components from corrosion, and checks the flow rate through the cooler.
10. You should get a minimum of 1.9 liters (2  quarts) of transmission fluid during this 30  second run. If the flow of fluid is insufficient, disconnect the oil cooler feed line at the radiator and restart the engine.
11. If the flow is insufficient, inspect the transmission for cause. Inspect the cooler pipes and fittings. Repeat the cooler flushing procedure. Replace the cooler if the flow is still insufficient.
12. Remove the discharge hose.
13. Reconnect the cooler return pipe to the transmission.
14. Refill the unit to the proper fluid level.

Automatic Transmission Fluid and Filter Replacement Install

1. Remove the oil level indicator.



2. Remove the nut or bolt that retains the fill tube to the mounting bracket.
3. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
4. Place a drain pan under the transmission.



5. Loosen the filler tube from the transmission.
6. Remove the filler tube seal.
7. Lower the vehicle.
8. Pull the tube out of the vehicle from the top.

1. Install the filler tube through the top of the vehicle.
2. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
3. Install the filler tube seal into the transmission. Lubricate the seal with DEXRON®-IIE, or DEXRON®-III
4. Install the filler tube into the transmission.
5. Lower the vehicle.



6. Install the nut that retains the tube to the mounting bracket.



7. Install the oil level indicator.
8. Adjust the oil level.

Automatic Transmission Fluid and Filter Replacement F/F Changing

1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Place a drain pan under the transmission oil pan.



3. Remove the oil pan bolts from the front and the sides only.
4. Loosen the rear oil pan bolts approximately 4 turns.

Notice: Pry the oil pan down carefully in order to prevent damage to the transmission case or the oil pan sealing surfaces.

5. Lightly tap the oil pan with a rubber mallet or pry in order to allow the oil to drain.
6. Inspect the oil color. Refer to Transmission Fluid Check .
7. Remove the remaining oil pan bolts.



8. Remove the oil pan.



9. Remove the oil pan gasket.



10. Remove the oil filter.
11. Remove the oil filter O-ring seal.
12. Inspect the O-ring seal. The O-ring seal may be stuck in the case.
13. Remove all traces of old gasket material. Clean the transmission case and the oil pan gasket surfaces with solvent, and allow to air dry.

Tools Required

J 36850 Transjel™ Transmission Assembly Lubricant

Notice: Use J 36850 or equivalent during assembly in order to retain checkballs or to lubricate components. Lubricants other than the recommended assembly lube changes the transmission fluid characteristics and causes undesirable shift conditions or filter clogging.

1. Coat the seal with a small amount of J 36850 or equivalent.



2. Install a new seal into the case.
3. Install a new filter into the case.



4. Install a new oil pan gasket.



5. Install the oil pan.

Notice: Refer to Fastener Notice in the Preface section.




6. Install the oil pan bolts.

Tighten
Tighten the bolts to 10 N·m (89 lb in).




7. Inspect the oil pan bolts and the washers.
8. Use adhesive and sealant compound GM P/N  12345382, or equivalent.
9. Lower the vehicle.
10. Fill the transmission to the proper level with DEXRON®-III oil.
11. Adjust the cold oil level reading for the initial fill. Do not overfill.
12. Inspect the oil pan gasket for leaks.