Yukon Gear and Axle YG GM12T-373T 3.73 Ring and Pinion Gear Set for GM 12-Bolt Truck

Upgrade the drivetrain performance of your GM 12-bolt truck with the Yukon Gear and Axle YG GM12T-373T High Performance Ring and Pinion Gear Set. Engineered with a 3.73:1 gear ratio, this set is designed to provide dependable power transfer, smooth operation, and strong durability for demanding truck applications. It is built for the 8.875-inch GM 12-bolt rear end and offers a reliable solution for performance-oriented rebuilds and gear ratio upgrades.
The YG GM12T-373T features a 30-spline pinion and a 3 Series thick gear design, making it suitable for specific 3 Series differential carrier configurations. The high-performance construction supports consistent engagement and long-term service when properly installed with the correct setup components, lubrication, and professional gear-pattern adjustment. This kit is intended for enthusiasts, builders, and technicians seeking a quality replacement or upgrade for a GM 12-bolt truck differential.
Designed by Yukon Gear and Axle, this ring and pinion set combines application-specific fitment with robust drivetrain engineering. Verify axle housing, carrier series, spline count, and gear compatibility before installation. Professional installation is recommended to ensure correct backlash, bearing preload, gear contact pattern, and break-in procedures. The kit is not air restricted and does not require truck freight handling.

Features:

• Brand: Yukon Gear and Axle

• Part Number: YG GM12T-373T

• Application: GM 12-bolt truck rear axle

• Gear Ratio: 3.73:1

• Pinion Spline Count: 30 spline

• Gear Design: 3 Series thick gear

• Axle Compatibility: 8.875-inch GM 12-bolt

• Product Type: High-performance ring and pinion gear set

• Installation: Professional setup recommended