Pinion Seal .635in Thick 7in Quick Change

The Pinion Seal .635in Thick 7in Quick Change from Winters is a precision-engineered seal assembly designed for high-performance differential applications. This component is essential for users who operate quick-change differentials in racing, off-road, and performance-driving environments where reliability under demanding conditions is non-negotiable. The quick-change design allows rapid differential swaps, making it invaluable for competitors who need to adjust gear ratios or service units efficiently between events.

Constructed with a bonded rubber and steel composite, the Pinion Seal .635in Thick 7in Quick Change features a .635-inch thickness that provides optimal sealing pressure while maintaining durability under high-load scenarios. The rubber-steel construction effectively prevents fluid leakage at the pinion shaft interface, a critical function in differentials where gear oil must remain contained despite rotational forces, vibration, and temperature cycling. The 7-inch quick-change format is specifically engineered to fit Winters quick-change differential housings, ensuring a secure fit that maintains seal integrity across extended operation.

This pinion seal is ideal for drag racers, road course competitors, and off-road enthusiasts who rely on Winters quick-change differentials for their vehicles. Installation is straightforward—the seal slides onto the pinion shaft during assembly or reassembly of the differential housing. Proper installation ensures that fluid remains sealed within the differential, preventing contamination and maintaining the correct oil level necessary for gear lubrication and cooling. Each unit is sold individually, allowing technicians to replace worn or damaged seals without purchasing unnecessary components.