Upgrade your vehicle's transmission system with this premium Rear Input Pinion Seal from Rev HD. This high-quality replacement part (RP-RI-004) is precisely engineered to fit and function perfectly, with cross-reference numbers 429-0011, 32503, and 100557 for easy compatibility verification. The seal features exact dimensions of 5.501 inches ID and 3.250 inches OD, ensuring proper fitment for your specific application. The distinctive orange and black design incorporates advanced sealing technology to maintain proper fluid retention and protect against leaks. Each seal comes complete with detailed installation instructions to help ensure correct fitment. This professional-grade component is designed for durability and reliable performance in automotive automatic transmission applications. Perfect for both professional mechanics and DIY enthusiasts who demand quality replacement parts for their vehicle maintenance needs.