2-4 Servo: Removal
NOTE:
Tools required: Servo Cover Depressor (J-29714-A).
- Raise and support the vehicle.
- Remove the transmission support. See TRANSMISSION SUPPORT in REMOVAL & INSTALLATION - BLAZER, JIMMY CANADIAN, SONOMA & S10 PICKUP article.
- Remove the exhaust manifold pipe.
- 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. See OIL COOLER LINES .
- Remove the oil pan bolt below and to the left of the 2-4 servo cover.
- Install the servo cover depressor to the oil pan rail.
- Tighten the bolt on the servo cover depressor to compress the servo cover. See Fig 1.
- Remove the servo cover retaining ring. See Fig 2.
- Loosen the bolt on the servo cover depressor to release tension on the servo cover.
- 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. See Fig 3.
- 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. See Fig 4.