GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Avalanche - 4WD 🢒 Transmission 🢒 Automatic Transmission - 4L60-E/4L65-E/4L70-E 🢒 Input Housing and Shaft Assembly Assemble

Special Tools

    • J 23327-1 Forward Clutch Spring Compressor (Bridge)
    • J 23456 Booster and Clutch Pack Compressor
    • J 25018-A Clutch Spring Compressor Adapter
    • J 26744-A Seal Installer
    • J 29882 Overrun Clutch Seal Protector
    • J 29883 Forward Clutch Seal Protector

    Object Number: 7431 Size: SH
  1. Install a new input to forward clutch housing O-ring seal (622).

    2. Object Number: 7437 Size: SH
  2. Inspect the 3rd and 4th clutch piston (623) for the following conditions:
    3. • Porosity or damage
    • Seal damage
  3. Install the 3rd and 4th clutch piston (623) into the input housing.

    4. Object Number: 7438 Size: SH
  4. Inspect the forward clutch housing (628) for the following conditions:
    5. • Proper check ball operation
    • Damage or distortion
    • Burrs in the seal areas
    • Cracks

    Object Number: 55912 Size: SH
  5. Inspect the forward clutch piston for the following conditions:
    6. • Porosity or damage
    • Seal damage
    • Apply leg damage

    Object Number: 55911 Size: SH
  6. Install the forward clutch piston (630) into the forward clutch housing (628).

    7. Object Number: 55910 Size: SH
  7. Install the 3rd and 4th spring assembly (626) into the 3rd and 4th clutch apply ring (625).

    8. Note: The forward clutch piston (630) apply legs must be indexed with the 3rd and 4th clutch apply ring (625) legs.

  8. Install the forward clutch housing (628) and forward clutch piston (630) into the 3rd and 4th apply ring (625).

    9. Object Number: 55919 Size: SH
  9. Install the J 29883 seal protector on the input housing.
  10. Install the 3rd and 4th clutch apply ring and the forward housing and piston assembly using the following procedure:
    11. • Hold the assembly by the 3rd and 4th clutch apply ring (625) legs during installation.
    • Do not let the forward clutch piston (630) separate from the forward clutch housing.
    • Firmly seat the assembly.
  11. Remove the J 29883 seal protector from the input housing.

    12. Object Number: 55918 Size: SH
  12. Inspect the overrun clutch piston (632) for the following conditions:
    13. • Porosity or damage
    • Seal damage
    • Overrun clutch ball proper operation

    Object Number: 55920 Size: SH
  13. Install the J 29882 seal protector on the input housing.
  14. Install the overrun clutch piston (632) into the input housing.
  15. Remove the J 29882 seal protector from the input housing.

    16. Object Number: 55921 Size: SH
  16. Using the J 26744-A seal installer , carefully install the overrun clutch piston outer seal.

    17. Object Number: 55922 Size: SH
  17. Install the overrun clutch spring (634) assembly.

    18. Object Number: 5759 Size: SH
  18. Install the J 23327-1 spring compressor (bridge) and the J 25018-A spring compressor adapter , and compress the overrun clutch spring assembly using J 23456 clutch pack compressor .
  19. Install the overrun clutch spring retainer snap ring (635).
  20. Remove the J 23327-1 spring compressor (bridge) and the J 25018-A spring compressor adapter .