Timken 222820 Manual Transmission Main Shaft Pilot Seal - Front or Rear

Timken 222820 Manual Transmission Main Shaft Pilot Seal

The Timken 222820 manual transmission main shaft pilot seal is built for precise sealing at the transmission shaft interface. It uses S-Nitrile construction and a ribbed rubber inner diameter to help seal minor spindle imperfections while promoting positive seating on the shaft.

Fits 1967-2001 Toyota, BMW, Audi, Volvo, Porsche, Ford, Mercury, Nissan, and Volkswagen manual transmission applications listed below, including BMW 750iL, BMW 850Ci, Porsche 944, and Toyota Celica fitments. This part cross-references National 222820 for the same application.

Key Features

• S-Nitrile material for oil and grease sealing performance
• Reinforced outer case helps resist installation damage
• Ribbed inner diameter helps seal minor shaft imperfections
• Internal contamination exclusion system helps block debris entry
• Vent holes promote lubricant flow around the seal lip to reduce heat buildup
• Outside diameter: 1.584 in. (40.23 mm)
• Shaft diameter: 1.102 in. (28.00 mm)
• Housing bore: 1.575 in. (40.00 mm)
• Width: 0.276 in. (7.00 mm)

Detailed Description

Timken 222820 is a manual transmission main shaft pilot seal designed to retain lubricant and keep contaminants out of the transmission sealing area. The seal’s precision profile, reinforced outer case, and contamination exclusion features support consistent sealing at the shaft and housing interface. It is listed for a wide range of manual transmission applications, including BMW 525i, BMW M5, Audi 100, Audi 200, Porsche 911, Volvo 740, and Toyota Pickup fitments, along with additional Toyota, Nissan, Ford, Mercury, and Volkswagen models.

Use this seal when servicing a leaking manual transmission main shaft area or replacing a worn pilot seal during transmission maintenance. The Timken 222820 dimensions and S-Nitrile construction make it a direct-fit sealing component for the listed applications.

What It Helps Fix

• Transmission fluid seepage at the main shaft seal area
• Grease or lubricant loss around the shaft interface
• Contamination entering the transmission sealing zone
• Seal wear caused by minor shaft surface imperfections
• Heat-related seal deterioration from poor lubricant circulation

Installation Notes and Tips

Verify shaft diameter, housing bore, and width before installation. Clean the bore and shaft thoroughly, and inspect for scoring, burrs, or excessive wear that could affect sealing. Proper alignment during installation helps protect the reinforced outer case and ensures the seal seats evenly. Confirm the vehicle’s transmission configuration and position against the fitment list before ordering.

Quality Assurance

Timken oil and grease seals are engineered with precision sealing designs and contamination control features to support reliable service in manual transmission applications. Part number 222820 is manufactured to match the listed dimensional specifications and application coverage.