Hello folks! Some possibly useful info for future gear swappers? While performing a 4.88 gear swap on the factory locking rear diff, my buddy and I could not get the backlash in spec, Precision Gear wants .008, the best we got is .016. Why is this? Normally, one would simply move the large adjusting nuts on a Toyota diff a smidge to tighen it up. Weeeeeeellllll, Toyota decided the locking diff would get shims! My bad assumption, should have lookined at the FSM. In my experience when dealing with diffs requiring shims, the old shims placed in their respective positions about and around the assembly with the new QAULITY R&P have brought things back to where they should be... usually. I did not expect this to be a stocked item at my dealer, the closest set was out in California at the main warehouse. More down time, no biggy. Questions, for those of you that have set up this diff, have you needed to change shims? For those that have not yet done this (but will), might be a good thing to get some of these before you rip in there...just in case!