GM Service Manual Online
For 1990-2009 cars only

    Object Number: 13046  Size: SH
  1. Inspect the reverse band servo components for the following conditions:
  2. •  A damaged, worn, or porous servo piston (44)
    • A damaged, worn, or porous servo cover (40)
    • A damaged servo piston seal (43)
    • A damaged servo cover seal (41)
    • A damaged servo cover snap ring (39)
    • A broken or collapsed servo piston spring (49)
    • A broken or collapsed servo piston cushion spring (45)
    • A damaged or worn servo piston pin (48)

    Object Number: 13047  Size: SH
  3. Install the cushion spring retainer (17) into the servo piston (44), if necessary.
  4. Assemble the servo piston (44), the servo piston cushion spring (45), the servo piston retainer (46), and the servo piston pin (48).
  5. Install the servo pin snap ring (42) into the servo piston pin (48).
  6. Install the oil seal ring (43) into the servo piston (44).
  7. Assemble the piston spring (49) into the servo assembly (43-48).

  8. Object Number: 10491  Size: SH
  9. Position the transmission so that the oil pan is facing down.
  10. Affix the seal (41) onto the servo cover (40).
  11. Install the servo and the cover assembly into the case (3).

  12. Object Number: 10488  Size: SH
  13. Using a long screwdriver, pry against the work bench in order to compress the reverse band servo assembly.
  14. Hold the servo assembly compressed.
  15. Use a small screwdriver in order to install the reverse band servo cover snap ring (39).
  16. Remove the long screwdriver.