1977 Lincoln Continental Differential Carrier Yukon Dura Grip - Ford 9 in. Rear - 31 Spline - Limited Slip - 4 Spring Aggressive Setup - May Chatter - Requires Longer Trac-Loc Bolts - 1.78 in. Bearing Journals - Rear guaranteed to replace your current 1977 Lincoln Continental Differential Carrier Yukon Dura Grip - Ford 9 in. Rear - 31 Spline - Limited Slip - 4 Spring Aggressive Setup - May Chatter - Requires Longer Trac-Loc Bolts - 1.78 in. Bearing Journals - Rear. 1977 Lincoln Continental Differential Carrier comes new OEM 1977 Lincoln Continental Differential Carrier aftermarket new 1977 Lincoln Continental Differential Carrier of remanufactured 1977 Lincoln Continental Differential Carrier Yukon Dura Grip - Ford 9 in. Rear - 31 Spline - Limited Slip - 4 Spring Aggressive Setup - May Chatter - Requires Longer Trac-Loc Bolts - 1.78 in. Bearing Journals - Rear.