BD Diesel Differential Cover - 81-93 Dodge Dana 70BD's design deflects the oil back onto the ring gear and into the pinion gear for cooler longer life. Other differential covers are large and bulky resulting in lubricating oil being flung off the ring gear causing addition heat and or wear. This Part Fits: Year Make Model Submodel 1982 1993 Dodge D150 Base 1982 1983 Dodge D150 Miser 1990 1991 Dodge D150 S 1982 1993 Dodge D250 Base 1982 1993 Dodge D350 Base 1994 2002 Dodge Ram 2500 Base 1994 2002