Removal Procedure
- Raise the vehicle. Refer to Lifting and Jacking the Vehicle
in General Information.
- Support the transmission with a suitable jack.
- Remove the transmission support. Refer to Transmission Support Replacement (4WD, ZR2)
or Transmission Support Replacement (RWD)
in Frame and Underbody.
- Remove the exhaust manifold pipe. Refer to Exhaust Manifold Pipe Replacement
in Engine Exhaust.
- Place a drain pan under the vehicle.
- Lower the transmission just enough to gain access to the oil cooler lines.
- Disconnect the oil cooler lines, if necessary, to gain access to the 2-4 servo. Refer to Transmission Fluid Cooler Hose/Pipe Replacement .
- Remove the oil pan bolt below and to the left of the 2-4 servo cover.
- Install the J 29714-A
to the oil pan rail. See Special Tools .
Courtesy of GENERAL MOTORS CORP.
- Tighten the bolt on the J 29714-A
in order to compress the servo cover. See Special Tools .
Courtesy of GENERAL MOTORS CORP.
- Remove the servo cover retaining ring.
- Loosen the bolt on the J 29714-A
to release tension on the servo cover. See Special Tools .
Courtesy of GENERAL MOTORS CORP.
- Remove the servo cover and O-ring seal. If the cover is hung up on the seal, use a pick (2) to pull and stretch the seal (1) out of the groove. Cut and remove the O-ring seal before removing the cover.
Courtesy of GENERAL MOTORS CORP.
- Remove the 2-4 servo assembly from the transmission.
- Inspect the 4th apply piston, the 2-4 servo converter, 2nd apply piston, and the piston inner housing for the following defects:
- Cracks
- Scoring
- Burrs and nicks