Yukon Gear YG GM9.25-373R 3.73 ring and pinion for the GM 9.25 IFS axle have been engineered with significant care and a strict attention to detail to provide the customer a strong, high-quality product that is easy to set up and quiet to use. Top-grade materials, deep heat treatment, and the latest in machining and manufacturing technology go into every Yukon product. No matter what vehicle you drive or gear ratio you need, Yukon Gear products are the right choice.