hey gang, really confusing rite now took rear apart axle splines are 17 , on the chunk its stamped M A 518 . m a is a truck chunk, splines should be 26/28? any help would be great. also on the pinion gear itself is stamped 3789391-10-39. number on chunk is 3707340 is it car rear truck it is 10 bolt. but wicth one????
