GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1998 🢒 Chevy C Pickup - 2WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L60-E 🢒 Extension Housing Rear Oil Seal

Required Tools

J 21426 Rear Extension Seal Installer

Removal Procedure
  1. Raise and support the vehicle.
  2. Remove the propeller shaft. Refer to one of the following as appropriate:
    3. •  Front Propeller Shaft Replacement in Driveline/Axle.
    •  One-Piece Propeller Shaft Replacement in Driveline/Axle.
    •  Two-Piece Propeller Shaft Replacement in Driveline/Axle.
    •  Three-Piece Propeller Shaft Replacement in Driveline/Axle.

    Object Number: 7766 Size: SH
  3. Remove the rear extension oil seal.

Installation Procedure

    Object Number: 7774 Size: SH
  1. Install the new seal using J 21426 .
  2. Coat the outer edge of the seal case with a non-hardening sealer.
  3. Install the propeller shaft. Refer to one of the following as appropriate:
    4. •  Front Propeller Shaft Replacement in Driveline/Axle.
    •  One-Piece Propeller Shaft Replacement in Driveline/Axle.
    •  Two-Piece Propeller Shaft Replacement in Driveline/Axle.
    •  Three-Piece Propeller Shaft Replacement in Driveline/Axle.
  4. Lower the vehicle.
  5. Fill the transmission to the proper level with Dexron® III Transmission Fluid.