Timken 1989 Manual Transmission Input Shaft Seal - Front

Manual Transmission Input Shaft Seal for Toyota and Acura

Timken 1989 is a manual transmission input shaft seal built to retain lubricant at the transmission input shaft while keeping dirt and debris out. Its S-Nitrile construction, reinforced outer case, and ribbed inner diameter support a secure seal on the shaft and housing surfaces.

Compatible With select Acura NSX, Integra, TL, Honda Prelude, and Toyota 4Runner, Land Cruiser, Pickup, and Van manual transmission applications, this seal is sized for precise service work where leakage control matters. Timken 1989 is a direct-fit sealing component for front-position applications listed below.

Key Features

• S-Nitrile material for sealing performance in transmission service
• Reinforced outer case helps resist installation damage
• Ribbed rubber inner diameter seals minor shaft imperfections and supports seating
• Internal contamination exclusion system helps block debris entry
• Vent holes promote lubricant flow around the seal lip to reduce heat build-up
• Dimensions: 1.699 in. outside diameter, 1.126 in. shaft diameter, 1.693 in. housing bore, 0.256 in. width

Detailed Description

Timken 1989 is a manual transmission input shaft seal designed around precision sealing geometry for transmission applications. The seal’s reinforced outer case adds durability during installation, while the ribbed inner diameter helps maintain contact on shafts with minor surface wear. Vent holes support lubricant circulation around the lip, helping manage operating temperature at the seal interface. This part cross-references National 710460 for the same application.

Use Timken 1989 when servicing manual transmission leaks on vehicles such as the Acura NSX, Acura Integra, Honda Prelude, and Toyota Land Cruiser. It also applies to select Toyota 4Runner, Pickup, and Van front-position manual transmission applications listed in the fitment data.

What This Seal Helps Address

• Transmission fluid seepage at the input shaft
• Debris intrusion into the sealing area
• Leakage caused by minor shaft surface imperfections
• Heat-related seal wear at the lip
• Damage from installation on the housing edge

Installation Notes and Tips

Confirm shaft diameter, housing bore, and width before installation. Clean the bore and shaft thoroughly, and inspect for scoring or corrosion before pressing the seal into place. Use care to keep the seal square during installation so the outer case seats evenly and the lip contacts the shaft correctly.

• Fits 1991-2005 Acura NSX, Front
• Fits 1994-2001 Acura Integra, Front
• Fits 1993-2001 Honda Prelude, Front
• Fits 1995-1998 Acura TL, N/A
• Fits 1984-1987 Toyota 4Runner, Front, H52
• Fits 1975-1987 Toyota Land Cruiser, N/A, H41
• Fits 1983-1987 Toyota Land Cruiser, Front, H52
• Fits 1983-1987 Toyota Pickup, Front, H52
• Fits 1984-1987 Toyota Van, Front, H52
• Fits 1969-1974 Toyota Land Cruiser, Front
• Fits 1970-1974 Toyota Pickup, Front

Quality Assurance

Timken sealing products are engineered with precision sealing designs and contamination control features for transmission service. Part number 1989 is built to match the listed dimensions and fitment requirements for the specified Acura, Honda, and Toyota applications.