Forward Servo

4L80-E/4L85-E

Forward Servo Replacement

Removal Procedure
1. Remove the transmission filter.
2. Remove the forward servo cover bolts, cover, and gasket.





3. Remove the following parts:
3.1. Forward servo piston pin (5)
3.2. O-ring seal (4)
3.3. Servo piston (3)
3.4. Retainer (2)
3.5. Piston spring (1)

Installation Procedure





1. Install the following parts:
- Piston spring (1)
- Retainer (2)
- Servo piston (3)
- O-ring seal (4)
- Forward servo piston pin (5)

Notice: Refer to Fastener Notice in Service Precautions.
Fastener Notice


2. Install the forward servo gasket, cover and bolts.
- Tighten the bolts to 24 Nm (18 ft. lbs.).
3. Install the transmission filter.