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- Detroit Truetrac Differential
- 1988-96 GM Car
- 1988-09 GM Truck
- 30-Spline Axles
- 8.5''/8.6'' Diameter Ring Gear
- Fits 2.73 & Up Gear Ratios
- *Used
All GM 8.5"/8.6"Eaton differentials require special bearings. For 28 spline axles with small bearing bores (race O.D. of 2.89"), usually found on vehicles prior to 1999, bearing LM-102949 and race LM-102911 are required. For 30 spline axles with large bearing bores (race O.D. of 3.06"), usually found on vehicles from 1999 to present, bearing LM-603049 and race LM-603012 are required. Will fit 2005.5-07 SAAB 9-7x
Enhance Your Vehicle's Driving Experience with a Trutrac Differential
The Detroit Truetrac is a helical-gear-style performance differential that maximizes wheel traction and enhances driving and handling characteristics. These units operate as a standard or open differential under normal driving conditions and are smooth, quiet, and automatic. They will engage without any driver's knowledge or action required providing worry-free performance.

