[Steve91T]

Not the kind that make my 2 year old little girl giggle, but clunking from the diff of my stock 10 bolt.

I noticed it after my track day last week. I'll try to get a video of it tonight. If I have the engine off and let the car roll backwards down my driveway, I hear clunking. Probably not supposed to do that, huh? I did get some nasty axle hop a couple of times, I know that's hard on it.

If it's bad, I have a stock axle off my 99 parts car. I just need to swap the brake lines and brakes over. I believe that's the only difference.

[79T/A]

With a clutch LSD, always use non-synthetic. Many already have friction modifier - be sure to read the bottle to confirm. Some have no additive, then you would add the gm friction modifier. The more modifier you add, the less effective the LSD will be. The less friction modifier you use, the noisier the diff will be (more chatter). When I used the POS auburn racers diff, I used standard gear oil with no additive. It made horrible noise, but if you use friction modifier in those things the tiny clutches burn out quickly.

I'm a fan of Torsen style diffs for track use. They last longer before wearing out, but can't be rebuilt like a clutch pack. I kept burning through auburn diffs (cone clutch) and won't go back. Currently using a Detroit truetrac. Not the best, but aftermarket support for these tiny 10 bolts is slim. Don't blame them for not wanting to support these junk axles.