1969 Mercury Cougar Differential Carrier Yukon Dura Grip - Ford 9 in. Rear - 28 Spline - Limited Slip - 2 Spring Smooth Setup - Requires Longer Trac-Loc Bolts - 1.78 in. Bearing Journals - Rear guaranteed to replace your current 1969 Mercury Cougar Differential Carrier Yukon Dura Grip - Ford 9 in. Rear - 28 Spline - Limited Slip - 2 Spring Smooth Setup - Requires Longer Trac-Loc Bolts - 1.78 in. Bearing Journals - Rear. 1969 Mercury Cougar Differential Carrier comes new OEM 1969 Mercury Cougar Differential Carrier aftermarket new 1969 Mercury Cougar Differential Carrier of remanufactured 1969 Mercury Cougar Differential Carrier Yukon Dura Grip - Ford 9 in. Rear - 28 Spline - Limited Slip - 2 Spring Smooth Setup - Requires Longer Trac-Loc Bolts - 1.78 in. Bearing Journals - Rear.