Timken 330663 Automatic Transmission Extension Housing Seal

Timken 330663 Transmission Seal Overview

The Timken 330663 automatic transmission extension housing seal is built for precise sealing at the transmission tail housing. It helps retain lubricant, block contaminants, and support consistent sealing performance on classic Chrysler and Dodge applications.

Compatible With 1956-1961 Chrysler Imperial, New Yorker, Newport, and Town & Country, plus 1960-1961 Dodge Dart and 1961 Dodge Lancer, this seal is sized for the specified housing and shaft dimensions.

Key Features

• Outside diameter: 1.880 in. (47.75 mm)
• Housing bore: 1.874 in. (47.60 mm)
• Shaft diameter: 1.375 in. (34.92 mm)
• Width: 0.311 in. (7.90 mm)
• S-Nitrile construction for transmission sealing applications
• Reinforced outer case for added durability during installation
• Ribbed rubber inner diameter for sealing minor shaft imperfections
• Internal contamination exclusion design to help block debris
• Vent holes promote lubricant flow around the seal lip to reduce heat buildup

Detailed Description

Timken 330663 is an automatic transmission extension housing seal designed to maintain a tight seal where the transmission output area meets the housing. Its precision sealing profile, reinforced outer case, and ribbed inner diameter support reliable seating on the shaft and housing surfaces. This part cross-references National 330663 for the same application.

For Chrysler Imperial, Chrysler New Yorker, Chrysler Newport, Chrysler Town & Country, Dodge Dart, and Dodge Lancer applications, the Timken 330663 seal is a direct-fit service part for the listed years and dimensions. The seal’s contamination exclusion features and vented design help maintain cleaner operating conditions around the seal lip.

What It Helps Address

• Transmission fluid leakage at the extension housing
• Contamination entering the seal area
• Seal wear caused by heat buildup
• Poor sealing on minor shaft surface imperfections
• Loss of lubricant retention at the tail housing

Installation Notes and Tips

Verify the housing bore, shaft diameter, and seal width before installation. Clean the sealing surfaces thoroughly and inspect the shaft for scoring or wear that could affect sealing performance. Proper alignment during installation helps prevent damage to the reinforced outer case and supports correct seating.

Quality Assurance

Timken transmission seals are engineered with precision sealing designs and durable materials for service in automatic transmission applications. The 330663 part number is also used as a National cross-reference, which helps confirm application matching for the listed vehicles.