This is a 3:08 posi rearend with the SD code for the Cutlass or 442 model car , it has benn acid dipped - primed - painted , backing plates - rear cover - pinion yoke were bead blasted and primed - painted , It has new uppper control arm bushings , new axle bearings and seals , new master bearing kit , posi and ring and pinion are very nice . This is backing plate to backing plate with 2 qts 85-90 gear lube and a bottle of posi additive already installed . Located in Hebron Illinois , zip 60034 .