GM/Dodge 11.5 Ring & Pin ion 3.73 Ratio

The GM/Dodge 11.5 Ring & Pinion 3.73 Ratio by MOTIVE GEAR is an essential drivetrain upgrade for truck and SUV enthusiasts looking to optimize highway cruising efficiency and towing performance. This ring and pinion set replaces worn OEM gearing and delivers the 3.73 ratio that strikes a critical balance between fuel economy on the freeway and usable torque multiplication off-road. Whether you're building a daily driver or a serious off-road rig, upgrading from factory gears to quality aftermarket components like this MOTIVE GEAR set ensures longevity and predictable performance under load.

The 11.5-inch ring gear diameter denotes the physical size of the ring gear itself—a specification critical for fitting into GM and Dodge heavy-duty differentials. The 3.73 ratio means for every 3.73 rotations of the driveshaft, the wheels rotate once, providing gear reduction that improves throttle response and torque delivery compared to numerically lower ratios like 3.55. MOTIVE GEAR manufactures these components to OEM-equivalent tolerances using premium steel, ensuring smooth operation, minimal backlash, and extended service life. Proper installation requires a differential carrier bearing preload setup and careful gear mesh adjustment—tasks best handled by experienced technicians with specialized tools.

This ring and pinion set fits full-size GM trucks (Silverado, Sierra) and Dodge Power Wagons equipped with 11.5-inch differentials, making it ideal for owners upgrading aging or damaged factory gearing. The 3.73 ratio is particularly popular for trucks that see mixed duty—highway commuting paired with weekend towing or light off-road use—since it avoids the excessive engine RPM penalty of steeper gears while still delivering meaningful low-end grunt. Installation requires removal of the differential cover, carrier, and careful extraction of the old ring and pinion set; reassembly demands precision shimming and bearing adjustment to ensure quiet, vibration-free operation. Always follow manufacturer specifications for installation torque and preload settings.