Shift Shaft Seal

The Richmond Shift Shaft Seal (Part Number T90A108) is a precision transmission seal engineered for 4-speed and 5-speed manual transmissions. This OEM-specification component prevents fluid leakage at the shift lever shaft penetration point—a critical sealing location that experiences constant mechanical cycling during gear changes. The seal's compact 2.15 × 0.75 × 2.7-inch profile and lightweight 0.03-pound construction make it a direct fit replacement for vehicles relying on Richmond transmission designs.

Transmission fluid loss through worn shift shaft seals reduces lubricant volume, accelerates internal wear, and can compromise synchromesh performance over time. Richmond manufactures this seal to factory specifications, ensuring proper interference fit and elastomer composition that maintains sealing integrity across thermal cycling and load variations inherent to manual transmission operation. The seal's design accommodates the precise shaft diameter and bore geometry of 4-speed and 5-speed manual boxes, preventing both outward weeping and inward contamination.

This seal is essential for owners restoring, rebuilding, or servicing manual transmissions where fluid retention is non-negotiable. Whether performing a full transmission overhaul or addressing an isolated leak at the shifter mechanism, the Richmond Shift Shaft Seal delivers OEM-quality sealing at a single-unit price point. Mechanics and restoration shops rely on Richmond transmission components for their dimensional accuracy and durability in both street and competition applications.

Stock this seal as a critical wear item for any 4-speed or 5-speed manual transmission service kit. Sold individually for targeted replacement.