Detroit Truetrac - GM 7.5 26-Spline

The Detroit Truetrac GM 7.5 26-Spline differential carrier (part number 911A415) is a high-performance limited-slip differential designed for GM 10-bolt rear axles rated 3.08 ratio and down. This steel differential carrier delivers improved traction and load-sharing across both drive wheels without the complexity of electronic or locking mechanisms, making it a proven choice for vehicles requiring enhanced off-road capability, towing stability, or consistent power delivery across varied terrain.

The 26-spline configuration matches GM 10-bolt axle shafts and ensures proper engagement with OEM or aftermarket axle components. Weighing 21.4 lbs, the carrier integrates into the differential housing with minimal modification. Limited-slip design allows some wheel slip differential under heavy cornering or acceleration, reducing binding while maintaining superior traction compared to open differentials. The steel construction provides durability in high-torque applications and extended field use. This carrier is compatible with 3.08 and numerically higher ratios (deeper gears), allowing flexibility in drivetrain configuration for different operational demands.

Purpose-built for operators running full-size and mid-size GM trucks and SUVs, particularly those operating in low-traction environments or carrying sustained heavy loads, the Detroit Truetrac improves directional control on sand, gravel, mud, or ice without the audible engagement shock of true locking differentials. Installation requires the differential housing to be removed and serviced; dealer or qualified technician service is recommended for proper fitment and adjustment of ring-gear and pinion alignment.