I am changing over the rear end from a 3.42 to a 3.73 posi. Do you guys have any tricks to solving the problem with out taking it to a shop. It's a '94 S-10 Extended Cab with a TBI 4.3 motor. Is there a way to correct it with a Scan Tool. Its an Auburn Gear, but from the sounds of it, it is not a popular choice. I will give it a try.