Yukon Gear & Axle YP PC11.5-HELIC Yukon Powr-Loc DifferentialDifferential Yukon Powr Loc Differential Yukon Powr Loc Differential; 11. 5 in.; Rear; Helical Gear Type; SPECIFICATIONS: WARNING CA Proposition 65: No FEATURES: Fits GM And Chrysler 11. 5 in. 30 Spline Yukon gear type helical limited slip differentials know how to put the power down. They use floating helical cut worm gears that lock the torque down when acceleration or wheel slippage occurs, transferring torque to the tire with the best traction in