Quote:
Thanks for the posts so far. So Dr. Diff, is it still a locker? And as for the circle track question, it had a ring gear attached that was a 2.76 ratio, at least according to the numbers on the side of the ring gear. It also had the part number of 2070684 atamped on it. I tried to do a search, but came up with nothing. I am assuming by the part number that it is a Mopar part number. Not knowing much about circle track racing (ok, knowing absolutely nothing!!!), I wouldn't think that a 2.76 would be a good gearing for any racing application. If I'm wrong, please feel free to correct me! 
Per my 1974 Petty Enterprises Catalog....
2.76:1 Ratio part number 2070690 (that is the part number you order. Many time the casting number or stamped number on parts are a different number but close). I would assume a 2.76 is a high banked speedway gear.
Ass'y, Differential Ratchet (No-Spin) p/n P3690151
FWIW...The picture in the PE Catalog of the Detroit Locker looks just like the one posted above.
Last edited by autoxcuda; 09/21/09 01:52 AM.
