These bushings fit where the differential bearings would normally be. (LM102910, LM102911, LM501310 or LM501314). (LM603011 & LM603012). One pair of housing end bushings or rings that fit either the 8.8" Ford Truck & Big GM housing ends that use the 2.535" o.d. bearing (R1559TV) or the 8.8" Ford car & Small GM housing ends that use the 2.25" o.d. bearings.
