rite, jack arse end up, then mark input shaft on diff, and mark on tire tread also.(chok front wheels to stop rolling).
method.....lie outside of vehicle on rite hnd sde ,just front of rear wheel
and keep an eye on mark on input shaft. then rotate tire 1 full revolution
and count the mark coming around on input shaft......u will then have answer.(it will vary with tire size too).
u can also calc tire revolution with engine rpm too...if u got note pad.
cheers carl g
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