FixVault

Overdrive Servo: Removal

NOTE:
  • Servicing the intermediate/overdreive servo in the vehicle is only recommended in the event of a leak. If servicing is required due to a servo condition, it is necessary to remove and disassemble the transaxle to inspect the intermediate/overdrive band assembly and direct clutch for damage.
  1. Raise and support the vehicle. Refer to LIFTING .
    WARNING:
    • The servo is under pressure. Servo and servo cover are under high spring force. Use caution when removing the servo cover. Failure to follow these instructions may result in personal injury.
  2. Assemble the special tool.
    Fig 1: Identifying Special Tool (307-295)
    G00985057Courtesy of MAZDA MOTORS CORP.
  3. Remove the splash shield.
    Fig 2: Identifying Splash Shield
    G00985058Courtesy of MAZDA MOTORS CORP.
  4. Remove the transaxle cooler line bracket bolt and position the bracket out of the way.
    Fig 3: Identifying Transaxle Cooler Line Bracket Bolt
    G00985059Courtesy of MAZDA MOTORS CORP.
    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.
  5. Using the special tool, remove the servo retaining ring.
    1. Install the special tool.
    2. Compress the servo assembly by tightening the bolt.
    3. Remove the retaining ring.
    Fig 4: Identifying Special Tool, Servo Retaining Ring, Servo Assembly Tightening Bolt & Retaining Ring
    G00985060Courtesy of MAZDA MOTORS CORP.
  6. Remove the special tool.
  7. Remove the servo cover assembly.
  8. Remove the intermediate and overdrive servo piston and return spring.
    Fig 5: Removing Intermediate & Overdrive Servo Piston & Return Spring
    G00985061Courtesy of MAZDA MOTORS CORP.
  9. Wipe the servo piston and the servo cover cap with a lint free cloth.
    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.
  10. 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.
  11. Squeeze the servo piston lip for flexibility. If the lip feels brittle, install a new piston
  12. Inspect the servo retainer spring for cracks, breaks or deformation.