I opened it up because the instructions that came with them from Doctor Diff spec'd .010-.012" backlash. If you look back to my previous posts I first set it up at .007" which is what the instructions from Motive said (.007-.009") so after the 500 miles of break-in it opened up to .009" and the noise didn't get any better or worse. Someone correct me if I'm wrong but the backlash itself doesn't affect noise, only the location that setting places the teeth in contact at. When under drive or coast the ring and pinion teeth are in constant contact.
