S-Trac Helical Differential for Dana 60/S60

The Strange S-Trac Differential (Part Number D3523) is engineered for Dana 60 and Strange S60 rear ends, specifically for applications using 35 spline axles and a 3-series carrier with a compatible gear ratio. This helical gear differential offers a smooth and progressive power transfer, distinguishing itself as an ideal choice for the most demanding street and track environments. Key features include its torque-biased, mechanical, and clutchless operation, which works to maximize traction and acceleration. The design emphasizes dependability, maintenance-free use, and quiet operation. Strange has incorporated an internal gear pocket geometry that minimizes stress risers and increases service life, complemented by an aggressive gear helix angle that promotes superior torque bias, excelling even in situations with unequal traction. Constructed with all internal gears made from 8620 steel, this differential utilizes chrome moly material that is vacuum heat-treated for enhanced strength. Strange guarantees the quality, as the unit is designed, machined, and assembled in-house with materials sourced from the USA. It is critical to note that only petroleum-based 85W-140 gear oil should be used; synthetic gear oil will adversely affect unit operation and void the warranty.