Timken 5126 Differential Pinion Seal - Front, Rear or Rear Outer

Timken 5126 Differential Pinion Seal

Timken 5126 is a rear differential pinion seal built for Chrysler, Dodge, and Plymouth applications that need reliable lubricant retention and contamination control. It is a direct-fit service part for many rear axle setups, including select Dodge Ram 1500, Ram 2500, Ram 3500, and classic Dodge truck and car platforms.

Key Features

• Precision sealing design helps keep gear oil in the differential and contaminants out
• Reinforced outer case helps resist installation damage and improve durability
• Ribbed rubber inner diameter helps seal minor spindle imperfections and seat securely
• Internal contamination exclusion system helps block debris that can lead to leakage
• Vent holes promote lubricant flow around the seal lip to reduce heat buildup

Detailed Description

Timken 5126 differential pinion seal is engineered for rear axle service where pinion seal leakage can affect differential performance and fluid level. It is used across a wide range of Chrysler, Dodge, and Plymouth rear applications, including 1994-1999 Dodge Ram 2500, 1997-1999 Dodge Ram 1500, and older Dodge D-series and W-series trucks. This part number is also listed for select Chrysler passenger cars and vans with supported 8.75 in. and 9.25 in. ring gear configurations. Timken 5126 is a practical replacement when servicing a leaking rear pinion area on Dodge Ram 1500, Ram 2500, or Ram 3500 rear axles.

This part cross-references with National 5126 for the same application.

What It Helps Fix

• Rear differential gear oil seepage at the pinion area
• Contamination entering the differential through a worn seal
• Heat-related seal wear from poor lubricant circulation
• Leakage caused by minor shaft or spindle surface imperfections
• Seal damage from previous installation or age-related hardening

Installation Notes and Tips

Verify axle and ring gear configuration before installation. Some applications require a Differential Pinion Race to be used with the Differential Pinion Seal for proper installation, and several listings specify 8.75 in. or 9.25 in. ring gear compatibility. Clean the sealing surface thoroughly, inspect the pinion area for wear, and confirm the replacement seal is seated squarely during assembly.

Quality Assurance

Timken oil and grease seals use precision sealing designs and reinforced construction to support dependable service in driveline applications. Part number 5126 is built for rear differential use on supported Chrysler, Dodge, and Plymouth vehicles.