GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1995 🢒 Cavalier 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T40-E 🢒 Inter Fourth Servo Disassemble, Assemble, and Install

    Object Number: 20831 Size: SH
  1. Remove the piston and pin assembly (76 and 77) from the servo cover (80).
  2. Remove the snap ring (70) from the servo pin (76).
  3. Remove the piston (77) and servo cushion springs (68) from the servo pin (76).
  4. Remove the outer (78) and inner (79) servo piston seal from the cover (80).
  5. Discard the outer and inner servo piston seals. Do not reuse the servo piston seals.

    6. Object Number: 20831 Size: SH
  6. Inspect all components for damage.
  7. Inspect the fluid feed holes for proper opening.
  8. Inspect the bolt hole threads for debris and stripping.
  9. Inspect the seal grooves for damage.
  10. Clean and dry each component.

    11. Object Number: 20831 Size: SH
  11. Install the servo cushion springs (68) and the servo piston (77) onto the servo pin (76).
  12. Install the snap ring (70) onto the servo pin (76) in order to retain the springs (68) and piston (77).
  13. Install the new seals (78) and 79) onto the servo piston (77) and servo cover (80).
  14. Install the servo piston assembly into the servo cover (80). Lubricate the piston seals with transmission fluid in order to aid in assembly.

    15. Object Number: 20168 Size: SH
  15. Install the servo return spring (75) onto the transmission case (51).
  16. Install the servo cover (80) and the piston assembly over the servo return spring (75).
  17. Install the three servo cover bolts (25). Hand start the bolts and then tighten the bolts to 12 N·m (9 lb ft).