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 .

Fig 1: Compressing The Servo Cover Using J 29714-A

Courtesy of GENERAL MOTORS CORP.

Tighten the bolt on the J 29714-A in order to compress the servo cover. See Special Tools .

Fig 2: Removing The Servo Cover Ring

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 .

Fig 3: Removing The Servo Cover And O-Ring Seal

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.

Fig 4: View Of 2-4 Servo

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