GM Caprice 1990-1993 Repair Guide

Extension Housing Seal (in Vehicle)



This seal controls transmission oil leakage around the drive shaft. Continued failure of this seal usually indicates a worn output shaft bushing. If so, there will be signs of the same wear on the driveshaft where it contacts the seal and bushing. The seal is available and is fairly simple to install, with the proper tool.

  1. Raise and safely support rear of the vehicle to minimize transmission oil loss when the driveshaft is removed.
  3. Unbolt the driveshaft from the differential. Wrap tape around the bearing cups to keep them in place on the universal joint and slide the shaft out of the transmission.
  5. Remove the floorpan reinforcement.
  7. Use a suitable tool to carefully pry out the old seal. Be careful not to insert the tool too far into the housing or the bushing will be damaged.
  9. Coat the outside surface of the seal with a non-hardening sealer. Use a suitable oil seal installation tool to evenly drive the new seal into the housing. Make sure the tool only contacts the outer metal portion of the seal.
  11. Install the driveshaft and floorpan reinforcement. Torque the universal bearing cup retainer bolts to 15 ft. lbs. (20 Nm). Recheck fluid level.