Tool Required

J 41172 Oil Seal Installer

1. Remove the transmission assembly. Refer to Two-Wheel-Drive Transmission Replacement or Four-Wheel-Drive Transmission Replacement in Manual Transmission or Two-Wheel-Drive Transmission Replacement or Four-Wheel-Drive Transmission Replacement in Automatic Transmission.
2. Remove the clutch and pressure plate on manual transmission equipped vehicles. Refer to Clutch Assembly Replacement in Clutch.
3. Mark the flywheel-to-engine position.
4. Remove the flywheel from the crankshaft. Refer to Engine Flywheel Replacement .




Important: To protect the crankshaft from damage, wrap the tip of the screwdriver with tape.

5. Carefully pry out the crankshaft rear oil seal using a screwdriver.

1. Apply GM P/N 1051344 Chassis Grease to the new crankshaft rear oil seal lip.

Important: The J 41172 will install the seal to the correct installed depth. Other seal installers may not seat the seal properly and oil leakage may result.

2. Position the new seal in place over the end of the crankshaft.
3. Lightly tap the crankshaft rear oil seal into place using a hammer and the J 41172 .
4. Install the flywheel. Refer to Engine Flywheel Replacement .
5. Install the clutch and pressure plate on manual transmission equipped vehicles. Refer to Clutch Assembly Replacement in Clutch.
6. Install the transmission assembly. Refer to Two-Wheel-Drive Transmission Replacement or Four-Wheel-Drive Transmission Replacement in Manual Transmission or Two-Wheel-Drive Transmission Replacement or Four-Wheel-Drive Transmission Replacement in Automatic Transmission.