[76stepsidechevy]

Hey, Just read through you thread and saw your pics of the chewed up posi carrier. I had the same marks on mine and thought it had been blown up and new gears installed at some point. when I took it apart I found the gears were stamped GM and 76 so they were probably original. Looks like a bad pinion bearing was allowing the pinion to contact the carrier while in reverse but being pushed away due to the gear design wile driving. I heard a strange noise while backing up sometimes and spent a while trying to chase it down and that ended up being the noise.