Case Extension Housing: Removal

1. Disconnect the negative battery cable. Raise and support the vehicle. Disconnect the right drive axle from the transaxle. See appropriate article in DRIVE AXLES.
2. Remove transaxle brace. See TRANSAXLE BRACE  . Remove the vehicle speed sensor. See VEHICLE SPEED SENSOR  .
3. Remove the case extension housing bolts. See Fig 1 . Remove the case extension housing with axle seal and the O-ring. Inspect the case extension for the following conditions:
   • Damaged or porous sealing surface for the case extension seal.
   • Damaged or porous sealing surface for the vehicle speed sensor.
   • Damaged or porous sealing surface for the right drive axle oil seal.
   • Damaged or porous sealing surface for the case extension housing.
   • Damaged or worn differential carrier bushing or output shaft bearing.
   • Damaged bolt holes.
   • Inspect the drive axle seal and replace if necessary.

Fig 1: Removing & Installing Case Extension

Courtesy of GENERAL MOTORS CORP.