Timken 1097N Automatic Transmission Extension Housing Seal

Timken 1097N Transmission Seal Overview

The Timken 1097N automatic transmission extension housing seal is built for controlled fluid retention at the transmission output area. It uses an S-Nitrile sealing material, a reinforced outer case, and a ribbed inner diameter to help seat against minor shaft imperfections while maintaining a consistent seal.

Compatible With select Volvo, Jaguar, Dodge, and Nissan applications, including 1987 Volvo 740, 760, and 780 with AW 55, AW 70, and AW 71 units. The Timken 1097N is also used in other listed manual and automatic transmission applications where the specified dimensions match.

Key Features

• Automatic transmission extension housing seal for transmission sealing service
• S-Nitrile material for fluid resistance in transmission environments
• Outside diameter: 1.953 in. / 49.61 mm
• Housing bore: 1.947 in. / 49.45 mm
• Shaft diameter: 1.375 in. / 34.92 mm
• Width: 0.500 in. / 12.70 mm
• Reinforced outer case helps resist installation damage
• Ribbed inner diameter supports sealing on minor spindle imperfections
• Internal contamination exclusion system helps block debris entry
• Vent holes promote lubricant flow around the seal lip to reduce heat buildup

Detailed Description

Timken 1097N is a transmission extension housing seal engineered for dimensional accuracy and dependable sealing performance. The seal’s reinforced outer case supports installation, while the ribbed rubber inner diameter helps maintain contact on shafts with minor wear. Its contamination exclusion design helps keep debris out of the sealing area, and vent holes allow lubricant circulation around the lip to manage heat during operation. This part cross-references Monroe Shocks & Struts (e.g., 550095) for the same application.

Vehicle fitment includes 1987 Volvo 740, 1987 Volvo 760, 1987 Volvo 780, 1984 Volvo DL, 1984 Volvo GLE, 1971-1974 Dodge Colt, 1973-1974 Jaguar XJ12, 1972-1974 Jaguar XJ6, and 1968-1971 Nissan 510. Use the Timken 1097N when the transmission seal dimensions and listed application match the vehicle service requirement.

What This Seal Helps Address

• Transmission fluid leakage at the extension housing
• Contamination entering the seal area
• Seal wear from minor shaft surface imperfections
• Heat buildup around the seal lip
• Leak-related service issues during transmission maintenance

Installation Notes and Tips

Verify shaft diameter, housing bore, outside diameter, and width before installation. Clean the housing and shaft sealing surface thoroughly, and inspect for scoring, burrs, or excessive wear that could affect sealing. Install the seal squarely to avoid distortion of the outer case or sealing lip. Confirm the transmission type and application details for Volvo, Jaguar, Dodge Colt, and Nissan 510 fitments before service.

Quality Assurance

Timken oil and grease seals are built with precision sealing designs and durability-focused construction for transmission service. The 1097N follows Timken’s sealing design approach for controlled lubricant retention and contamination exclusion in demanding drivetrain applications.