Knocking after diff replacement

[pnosker]

I swapped to an E30 diff and now when I change directions (1st to reverse, or reverse to 1st) there's a knock. It's not loud, but it sounds like there's something banging due to torque direction. I checked all the diff bolts and they're all tight. Any other ideas?

PS. Happy Independence Day!

[Xenocide]

no knocking at speed or accelerating??

Might just be your transmission. I know that 1st-Reverse clunk in the e46 m3 is considered normal by BMW NA

[mgbman69]

Thats pretty normal for most lsd diffs. Every RWD car with an LSD that I've owned did that.

[Philly]

My Mcoupe LSD does not do this.... if it does, i can't hear it.

Could just have a little bit of excessive play.

If your fluid is good, I wouldn't worry.

[cooljess76]

IIRC Mcoupe's have a Torsen(???) style LSD while e30's and such use a clutch style.

[pnosker]

My 3.45 LSD didn't do that... oh well, I'll just assume it's normal.