Eaton Detroit TrueTrac LSD Differential For 14+ GM Truck 1500 12-Bolt (9.5 & 9.76") 33 spline axle - Part Number 917A732
Arguably the most popular LSD upgrade for the 99-present GM Truck 1500 platform. The OEM differential in the 14+ Trucks leaves much to be desired once you begin increasing performance. The TrueTrac differential uses helical cut gears and offers considerably more strength than the OE design.
"Eaton Detroit Truetrac differentials use a patented design of parallel-axis planetary helix gears to provide a quiet, automatic splitting of torque. They perform like a limited-slip differential under normal driving conditions, automatically transferring torque to the wheel with better traction when ground conditions warrant. These replacement units are available for dozens of axle applications."
Designed for 3.42-3.73 gear ratios. Factory differential cover oil drain plug may need shortened by approximately 1/8 in. to maintain clearance with the differential.
Eaton recommends a petroleum/mineral based GL-5 80W90 gear oil for all Truetrac differentials. Do not use synthetic gear oil or friction modifiers.