Chevrolet/GMC True-Trac

Tractech has improved the design of our Dana 30 and Toyota differentials. We now offer a 3 pinion gearest design vs. 2 pinion,which provides 50% increased torque capacity, added durability and dependability. A preload is included on the above models to help bias torque transfer in low coefficient applications such as ice, mud, snow, etc. TruTrac differentials provide a smooth torque transfer by the use of helical gears vs. clutch plates or cone clutches, and can be used in front axles with no effect on steering.

DET913A309 GM 10-bolt 8.5" - 2.73 - 5.57 ratios 30 spline

DET913A315 GM 12-bolt 8.875" - 3.73 - 4.56 ratios

DET913A322 GM 10-bolt 8.5" - 2.73 - 5.57 ratios 28 spline

DET913A332 GM 10-bolt 8.5" - 2.73 - 5.57 ratios 28 spline