Overdrive Servo: Removal
WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
- With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to JACKING AND LIFTING article.
- Remove the 7 retainers and the LH splash shield.
- Remove the transmission fluid cooler tube bracket and bolt and position it aside.
- Using the special tool, remove the servo retaining ring.
- Install the special tool.
- Compress the servo assembly by tightening the bolt.
- Remove the retaining ring.
- Remove the servo cover assembly.
- Remove the intermediate and overdrive servo piston and return spring.
- Wipe the servo piston and the servo cover cap with a lint free cloth.
- Inspect the servo piston for cracks on its pressure surfaces and in the sealing area. Look for damage near the point where the servo piston is attached to the servo rod.
- Squeeze the servo piston lip for flexibility. If the lip feels brittle, install a new piston.
- Inspect the servo retainer spring for cracks, breaks or deformation.
NOTE:
Servicing the intermediate/overdrive servo in the vehicle is only recommended in the event of a leak. If the servo has failed it will be necessary to remove and disassemble the transaxle to inspect the intermediate/overdrive band assembly and direct clutch for damage.
WARNING:
Follow the specified procedure when using the tool to remove the servo cover. The servo and servo cover are under high spring force and can separate forcefully, which may result in serious personal injury.
CAUTION:
Do not use a screwdriver to remove the retaining ring or damage to the case may occur. Use only snap ring pliers to remove the retaining ring.
CAUTION:
Do not clean the rubber sealing surfaces of the servo piston and the servo cover cap with cleaning solvent or damage to the sealing surface may result.