REMOVAL & INSTALLATION
See Figures 1, 2, 3, 4, 5, 6 and 7
The vehicle should be driven 15 miles to warm the transmission fluid before the pan is removed.
The fluid should be drained while the transmission is warm. Fluid which is at normal operating temperature will flow better, removing more contaminants or impurities than cold fluid.
- Raise and support the front of vehicle using jackstands.
- Place a drain pan under the transmission pan.
- If necessary, remove the crossmember from the rear of the transmission.
- Remove the pan bolts from the front and the sides, then loosen the rear bolts 4 turns.
- Using a small prybar, carefully separate the front of the pan from the transmission. This will allow the pan to partially drain. DO NOT use excessive force when attempting to break the gasket seal. DO NOT bend or otherwise damage the pan and the gasket mating surfaces. If necessary, loosen the bolts a few more turns to allow the pan more play without stressing the flange.
- Remove the remaining pan bolts and lower the pan from the transmission. Again, be CAREFUL as the pan still contains a decent amount of HOT and MESSY transmission fluid. This is very slimy stuff and if you spill it on yourself (besides possibly being burned) you will feel slimy for days no matter how much you wash.
If the transmission fluid is dark or has a burnt smell, transmission damage is indicated. Have the transmission checked professionally.
- Empty the pan, remove the gasket material and clean with a solvent. If you use a putty knife to clean the gasket surfaces, be very careful not to score or damage them. Most late-model vehicles utilize a rubber seal that comes off the pan, with relative ease.
- As-long-as you've gone through the trouble to drop the pan, you might as well replace the filter. Changing the automatic transmission fluid and filter are the MOST important things you can do to help assure a long, trouble-free transmission life. Well, that and avoiding trying to pull tree stumps on a regular basis.
- Remove the screen and the filter from the valve body.
When removing the filter from the valve body, be sure that the old O-ring is removed with the filter. Sometimes it remains stuck in the pump.To install:
- Install a new filter using a new gasket or O-ring.
If the transmission uses a filter having a fully exposed screen, it may be cleaned and reused.
- To install the oil pan, use a new gasket and sealant, then reverse the removal procedures. GM recommends that you use Transgel® sealant on the new gasket. Tighten the pan bolts to 97 inch. lbs. (11 Nm) in a crisscross pattern.
- Refill the transmission through the dipstick guide/filler tube. Please refer to the capacities chart later in this section to determine the proper amount of fluid to be added.
- With the gearshift lever in PARK , start the engine and let it idle. DO NOT race the engine.
- Apply the parking brake and move the gearshift lever through each position. Return the lever to PARK and check the fluid level with the engine idling. The level should be between the two dimples on the dipstick, about 6mm ( 1 / 4 in.) below the ADD mark. On dipsticks that are so marked, the fluid should remain in the COLD zone until the transmission has fully warmed. Add fluid, if necessary.
- Check the fluid level after the vehicle has been driven enough to thoroughly warm the transmission.