Diffs: large case, small case

Fri Jul 17, 2009 5:14 pm

I've got a 4.1 small case diff from my 318iS.
I recently removed a 3.9 LSD that was from a 325 sport. It was fitted to another 318iS. It looks identical to me.

I thought that the 325 had a large case and the 318is was a small case diff. Do the housings look the same?

Fri Jul 17, 2009 5:23 pm

Small case has 6 bolts holding the back plate on,large case has 8 bolts

Fri Jul 17, 2009 6:06 pm

OK, thanks, I'll inspect both the diffs then.

Sat Jul 18, 2009 8:16 am

Here's a photo of both that might be useful:

Sun Jul 19, 2009 1:18 am

Thanks. I took a closer look today.
The diff from my 318iS is 6 bolt.
The 325 diff is 8 bolt.
As expected.