So, as some of you might know I have been chasing a rattle in my Truetrac diff, on coast at certain speed there was a rattley clunking (sounded like a jam tin full of oil with a couple of lug nuts inside rolling around, pretty loud) not a timed knock with axle rotation, just a rattle, I have chased all sorts of things, had the centre out and rechecked pinion pre-loads all new bearings, its done 2000 miles and has been there the whole time, even changed from an E to a B body housing and axles, tightened the adjustable axle bearings up to next to zero end float.
Well, I decided to grab the back wheels at the 3 and 9, 6 and 12, wobble them just like you would to check the front wheel bearings and tie rod ends etc, well, I found the problem!!!!! wheel bearing are new, tight in the housing and adjusted to have 0.006" end float, have a listen and watch the wheel, whats happening is the side gear in the trutrac looks like its moving considerably in the Truetrac body, its most definitely not the wheel bearings moving. diff oil is clean, no metal.
