8 3/4 backlash

Purchased a perfect 742 center from a MOPARTS member that I am going to insatall a posi unit in. Backlash from this untouched unot is a shade over .003" I know the manuals recommend .006-.008 Do I adjust this to specs or retain the original backlash. This unt is untouched since 68.

Is that cleaned up without lube on the teeth or with lube? I firmly belive in the old adage, if it ain't broke, don't fix it

This was a cleaned unit without lube; haven't seen one this tight. I'll set it and check the teeth contact pattern and go from there. Thanks cab

Must have never been driven , they are never that tight .

If it were me I would install it in a car and drive it BEFORE taking it apart , if you change the backlash it's going to whine and hopefully it can be driven enough to readjust the pattern and quiet it down.