SKF 18658 Manual Transmission Seal - Rear or Rear Upper

Manual Transmission Seal for Warner Applications

SKF 18658 is a manual transmission seal built for rear and rear upper sealing locations on select Warner and New Process 203 applications. It is specified with a nitrile sealing surface, 1.875 shaft diameter, 2.754 outside diameter, and 0.313 width for a precise fit in the intended transmission or transfer case housing.

Key Features

• Nitrile sealing surface for dependable fluid control in transmission service
• 1.875 shaft diameter, 2.754 outside diameter, and 0.313 width
• Designed for rear and rear upper sealing positions
• SKF engineered seal construction for long-term service in drivetrain applications
• Cross-references Four Seasons 47582 for the same application

Fitment Details

• Fits 1977-1981 Chevrolet Camaro, rear; manual transmission seal fits Warner transmissions.
• Fits 1974-1981 Chevrolet Corvette, rear; manual transmission seal fits Warner transmissions.
• Fits 1978-1981 Chevrolet El Camino, rear; manual transmission seal fits Warner transmissions.
• Fits 1978-1981 Chevrolet Malibu, rear; manual transmission seal fits Warner transmissions.
• Fits 1981 Chevrolet Monte Carlo, rear; manual transmission seal fits Warner transmissions.
• Fits 1978-1979 Chevrolet Monte Carlo, rear; manual transmission seal fits Warner transmissions.
• Fits 1974-1981 Pontiac Firebird, rear; manual transmission seal fits Warner transmissions.
• Fits 1978-1979 Ford Bronco, rear upper; transfer case output shaft seal compatible with New Process 203 models.
• Fits 1978-1979 Pontiac Grand Am, rear; manual transmission seal fits Warner transmissions.
• Fits 1974-1975 Pontiac Grand Am, rear; manual transmission seal fits Warner transmissions.
• Fits 1976-1979 Pontiac Grand LeMans, rear; manual transmission seal fits Warner transmissions.
• Fits 1976-1979 Pontiac LeMans, rear; manual transmission seal fits Warner transmissions.
• Fits 1974 Pontiac LeMans, rear; manual transmission seal fits Warner transmissions.
• Fits 1974 Chevrolet Nova, rear; manual transmission seal fits Warner transmissions.

What This Seal Helps Address

• Transmission fluid seepage at the rear output area
• Transfer case oil leakage at the rear upper output shaft seal
• Contamination entering the sealed drivetrain housing
• Wear-related sealing loss on older Warner transmission applications
• Service replacement for vehicles showing dampness around the seal lip

Installation Notes

Confirm shaft diameter, outside diameter, and seal width before installation. Clean the bore and shaft surface thoroughly, inspect for grooves or scoring, and install the seal squarely to avoid lip damage. For Ford Bronco applications, verify New Process 203 transfer case configuration before ordering. This part number, SKF 18658, is also referenced by 172286 in related catalogs.

Quality Assurance

SKF has a long history in seal engineering and manufacturing, including early integrated shaft seal development. This seal is produced to defined design and material standards to support proper sealing performance in drivetrain service.