Timken 340797 Manual Transmission Shift Shaft Seal

Timken 340797 Manual Transmission Shift Shaft Seal

The Timken 340797 manual transmission shift shaft seal is built for precise sealing at the shift shaft to help retain lubricant and block contaminants from entering the transmission. It is a direct-fit style seal for select Jeep, Ford, Mercury, and Dodge manual transmission applications, including Warner T14, T15, T86, T90, T96, T85, and T89 setups.

With S-Nitrile construction, a reinforced outer case, and a ribbed inner diameter, this seal is designed to seat securely and maintain contact even where the shaft surface shows minor imperfections. Timken 340797 is a practical replacement for worn shift shaft seals on vehicles such as Jeep CJ5, Jeep CJ7, and Jeep Wagoneer applications.

Key Features

• Manual transmission shift shaft seal for select Warner transmission applications
• S-Nitrile material for sealing performance and lubricant resistance
• Reinforced outer case helps reduce installation damage
• Ribbed rubber inner diameter promotes positive shaft seating
• Internal contamination exclusion system helps block debris entry
• Vent holes allow lubricant flow around the seal lip to reduce heat buildup
• Timken 340797 cross-references National 340797 and NGK 6130

Detailed Description

Timken 340797 is a transmission sealing component engineered around precise dimensions: 0.943 in. outside diameter, 0.935 in. housing bore, 0.593 in. shaft diameter, and 0.175 in. width. Those measurements matter for a secure fit in manual transmission shift shaft locations, where sealing accuracy directly affects lubricant retention and contamination control. This part number is also referenced as Timken 340797 in catalog listings for easy identification.

Compatible With 1974-1979 Jeep Cherokee, 1966-1979 Jeep CJ5, 1976-1979 Jeep CJ7, 1974-1979 Jeep J10, 1974-1979 Jeep J20, and 1972-1979 Jeep Wagoneer applications that use Warner T14, T15, T86, T90, or T96 manual transmissions. It also fits 1969-1971 Ford E-100 Econoline, 1967 Ford LTD, 1965-1967 Mercury Colony Park, 1967 Mercury Cougar, 1967 Mercury Marquis, 1965-1966 Mercury Marauder, and 1960-1961 Dodge Dart applications listed with Warner transmission notes.

What It Helps Fix

• Transmission fluid seepage at the shift shaft
• Contamination entering the manual transmission through a worn seal
• Seal leakage caused by age, hardening, or wear
• Poor sealing on shafts with minor surface imperfections
• Heat-related seal deterioration from restricted lubricant flow

Installation Notes and Tips

Verify shaft diameter, housing bore, and seal width before installation to confirm the seal matches the transmission case and shift shaft dimensions. Clean the bore and shaft thoroughly, inspect for scoring or corrosion, and install the seal squarely to avoid lip damage. Timken 340797 is commonly used on Warner T14, T15, T86, T90, T96, T85, and T89 manual transmission applications, so matching the transmission code is important during service.

Quality Assurance

Timken oil and grease seals are built with precision sealing designs intended to retain lubricant and exclude contaminants. The reinforced case, contamination barrier, and vented lip design reflect Timken’s focus on durable sealing performance for drivetrain service.