04-06 GTO 3.90 Gear Set

The 04-06 GTO 3.90 gear set by Motive Gear is a direct-fit ring and pinion assembly designed specifically for Pontiac GTO owners looking to enhance acceleration and improve launch characteristics. This gear ratio upgrade is an essential modification for those interested in street performance, drag racing, or spirited driving. It transforms the driveline by increasing mechanical advantage off the line.

Manufactured by Motive Gear, a reputable OEM and performance supplier, this ring and pinion set features precision-cut helical gears that are designed to reduce noise and improve durability under load. The 3.90 gear ratio strikes a balance between stock and extreme builds, providing enhanced driveability while optimizing torque delivery for various performance applications. Quality steel construction and proper heat treatment ensure longevity through repeated acceleration cycles.

This gear set is compatible with 2004–2006 Pontiac GTO models and serves as a direct bolt-in replacement for the factory differential housing. Professional installation is recommended, as the process requires differential removal, bearing preload adjustment, and backlash setup using a dial indicator. Whether you're building a weekend warrior or enhancing your factory setup, this gear set is a valuable upgrade.