Listing for a friend, 1958 Pontiac Bonneville 9.3 rear end, complete drum to drum with the trailing arms included. From what I can find out the same 9.3 carrier is the same for Pontiac and Olds from 57-64. These rears were the go- to set up back in the glory days for the serious racers. Check out the pictures, ask any questions you may have and I will do my best to answer. I am not sure of the ratio but I do believe it is a factory limited slip or posi as when you turn one wheel the other side turns the other way. It came out of a recently totaled very decently owner restored 58 Bonneville HT. This will be a cash only with a $250.00 good faith non-refundable deposit up front and balance paid at time of pickup in south-eastern Ohio, about 50 miles south of Columbus, Ohio. Nice rear bumper, front and rear seats and lots of small parts still available. The Tri-Power 370 and Hydramatic are sold.