TC3 Diff Question
Last night my TC3 was making a horrid screeching noise, apparently from the rear end, only under heavy initial acceleration. Suspecting that a bearing might have gummed up and been spinning in its housing I just started stripping it down. Sure enough there does seem to be a dodgy bearing, which is easily replaced.
But also, I'm checking the diff for the first time as well (I bought this car second hand) and I'm a little confused. I've built a number of AE diffs for B4's and T4's and in every case, when built, the diff was tight but relatively free - you could grasp the main gear and twist one outdrive and the other outdrive would rotate in the opposite direction with little or no effort. The diff I just pulled from the TC3 is really tight - if you hold the main gear it take considerable effort to turn an outdrive. IS THIS RIGHT??? I'm guessing it shouldn't be this tight but, like I said, all my experience is with off-road diffs.
There is no crunchiness, so I believe the balls and rings are probably OK. So questions:
(a) Should you be able to rotate the outdrives easily?
(b) Should I simply rebuild the thing? If so should I replace the balls and rings?
Thanks for any advice!