I had gotten my restoration car ready to go and get a quarter panel replaced when the rear end went out. It has the #2070741 and 308AAPW on the case. It has a tag on the case with 2.94 which is the ratio I believe. Can I replace this with one that has a sure grip. After reading other posts, is there much difference between the 2.94 and the 3.25 gears. Where is a safe place to get the gears to repair. I have not been in a rear end so not sure what I am getting into. On the car the engine (318) and tranny have been rebuilt and now the rear end went out. Any help is greatly appreciated.