GM Service Manual Online
For 1990-2009 cars only

Special Tools

    • J 21426 Rear Seal Installer
    • J 39440 Extension Housing Seal Installer

    Object Number: 588788  Size: SH
  1. Using the J 21426 seal installer , install an output shaft sleeve (690) and an output shaft seal (691).
  2. Do not push the sleeve past the machined surface on the output shaft.


    Object Number: 588790  Size: SH
  3. Install the case extension to case seal (30) and the case extension (31).
  4. Caution: Refer to Fastener Caution in the Preface section.

  5. Install the case extension to case bolts (32). Tighten the bolts to 45 N·m (33 lb ft).

  6. Object Number: 1462840  Size: SH
  7. Inspect the transmission speed sensor for the following conditions:
  8. • Cracks
    • Nicks
    • Damage

    Object Number: 1462842  Size: SH
  9. Install a new O-ring seal (37) on the internal transmission speed sensor (36).
  10. Install the internal transmission speed sensor (36).
  11. Install the speed sensor retaining bolt (35). Tighten the bolt to 12 N·m (9 lb ft).

  12. Object Number: 207641  Size: SH

    Note: If installing a slip yoke (booted) type seal (34), position drain hole (1) toward the bottom of transmission within area shown.

  13. Using the J 21426 seal installer and J 39440 seal installer or equivalent, install the case extension oil seal assembly (34) (model dependent).