Timken 330385 Transfer Case Selector Shaft Seal

Transfer Case Selector Shaft Seal for 4WD Applications

Timken 330385 is a transfer case selector shaft seal built for 4WD driveline service where keeping lubricant in and contaminants out matters. It uses an S-Nitrile sealing material with a reinforced outer case and a ribbed inner diameter to help seat against minor shaft imperfections.

This seal is used across a wide range of Ford, Mazda, Lincoln, Mercury, Chevrolet, and GMC applications, including Ford Explorer, Ford F-150, and Ford Ranger transfer case service.

Key Features

• S-Nitrile construction for oil and grease sealing applications
• Outside diameter: 0.756 in. / 19.20 mm
• Housing bore: 0.750 in. / 19.05 mm
• Shaft diameter: 0.375 in. / 9.53 mm
• Width: 0.252 in. / 6.40 mm
• Seal type 33 design for transfer case selector shaft service
• Reinforced outer case helps resist installation damage
• Ribbed inner diameter promotes positive seating on the shaft
• Internal contamination exclusion system helps block debris entry
• Vent holes help circulate lubricant around the seal lip and reduce heat build-up

Detailed Description

Timken 330385 transfer case selector shaft seal is engineered for sealing the selector shaft area in transfer case and related 4WD housing applications. The seal’s dimensions and S-Nitrile material make it a direct-fit service part for many Ford Explorer, Ford F-150, Ford Ranger, and Mazda B-series transfer case setups, along with additional Lincoln, Mercury, Chevrolet, and GMC listings. This part cross-references National 330385 for the same application.

Use Timken 330385 when servicing a leaking selector shaft area, replacing a hardened or worn seal, or addressing contamination around the transfer case input or extension housing. The design focuses on maintaining lubricant retention while limiting debris intrusion that can contribute to premature leakage.

What It Helps Solve

• Transfer case fluid seepage at the selector shaft
• Contamination entering the seal area through worn sealing surfaces
• Leakage caused by minor shaft imperfections
• Heat-related seal wear from poor lubricant circulation
• Service issues on 4WD transfer case input shaft bearing and extension housing applications

Installation Notes and Tips

Verify shaft diameter, housing bore, and seal width before installation. Clean the bore and shaft thoroughly, inspect for scoring or corrosion, and install the seal squarely to avoid lip damage. Confirm the transfer case model and housing style, especially on Warner 1354, 1356, 4403, 4404, 4405, 4406, 4416, 1370, 4401, 4470, and related applications listed for Ford, Mazda, Lincoln, Mercury, Chevrolet, and GMC vehicles.

Fits 1983-2008 Ford Ranger, 1987-2008 Ford F-150, 1991-2008 Ford Explorer, and other listed applications with the correct transfer case configuration. Fits 1994-2007 Mazda B4000 and 1997-2008 Mercury Mountaineer transfer case service applications as listed.

Quality Assurance

Timken oil and grease seals are built with precision sealing geometry, a reinforced outer case, and contamination-control features to support reliable service in driveline applications.