Ford 8.8in Ring & Pinion 3.90 Ratio

The Motive Gear Ford 8.8 inch Ring and Pinion 3.90 ratio is designed for automotive enthusiasts and builders looking to enhance driveline performance in Fox-body Mustangs, SN95 platforms, and late-model F-Series trucks. This gear set significantly improves rear-end acceleration and cruising characteristics by optimizing the mechanical advantage between the engine and wheels.

Motive Gear manufactures this ring and pinion set with precision-cut hypoid gears that are built to endure sustained loads and spirited driving, ensuring longevity. The 3.90 ratio indicates that the driveshaft rotates once for every 3.90 turns of the ring gear, which helps reduce engine RPM at highway speeds while enhancing torque delivery during acceleration.

This ring and pinion set is ideal for street machines, drag-oriented builds, and truck owners who require performance in low-speed, high-torque scenarios. Proper installation is crucial, as it requires precise backlash and depth setup to optimize noise levels, bearing life, and power transmission efficiency.