GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 43780 Transmission Case Locating Pin Installer

Transmission Case Fill Plug Disassemble


    Object Number: 1216971  Size: SH
  1. Remove the fill tube plug (1).
  2. Remove the fill tube seal (2).
  3. Install the fill tube seal (2) into the transmission case.
  4. Align the tab on the fill plug (1) with the tang on the transmission case.
  5. Important: The fill plug retaining tab snaps into place over a tang on the transmission case.

  6. Install the fill plug (1) into the fill tube seal (2).
  7. Press the fill plug down until the retaining tab locks into place.

Transmission Case Vent Disassemble


    Object Number: 1216973  Size: SH
  1. Pry the vent cap (1) away from the transmission case.
  2. If the vent tube (2) remains, gently pry the vent tube from the transmission case.
  3. Gently tap a new vent assembly into the transmission case until the vent is seated.

Transmission Case Locating Pin Disassemble


    Object Number: 1217165  Size: SH

    Notice: DO NOT mar the transmission case surface when removing the locating pin. An unmarred surface is required to maintain the seal between the low and reverse clutch housing assembly and the transmission case.

    Important: Do not replace the transmission case locating pin unless the locating pin is damaged.

  1. Remove the locating pin (1) from the rear surface of the transmission case.
  2. Install a new locating pin (1) into J 43780  (2).
  3. Using J 43780  (2), drive the locating pin until seated.
  4. Locating Pin Installed Height
    Make sure the locating pin is installed to a height of 20.80-21.20 mm (0.819-0.835 in) above the transmission case rear surface.