Eaton Detroit No-Spin Differential 36 Spline 1.84in Axle Shaft Diameter Rear Dana S135The Eaton Detroit Truetrac limited slip differential is the pioneer in helical gear based traction technology. Wheel spin out is limited by the differential, which employs pinion and side gear separation forces to automatically transfer torque to the wheel with the best traction. Mobility, stability and handling are enhanced, and drivers can be confident knowing that up to 3. 5 times more torque is being transferred to the high traction wheel.