"John Burns" > wrote in message
...
> Just tried to replace the diff on my '90 318iS (lasted 182k, not bad)
> with one from a '90 318i (didn't see the donor car in person I might
> add). The bolt patterns where it connects to the subframe are different
> on the new diff.
>
> Now my parts CD only shows one design of subframe and the new diff has a
> similar 4.10:1 ratio, so it's not from a 325i or anything. I'm wondeing
> if it's from a 518i?
>
> Can someone confirm that all E30 diffs have the same mounting points to
> the subframe?

I can't confirm that for you, but i can mention that there is an outside
chance that diff came from an automatic iX, unless you can otherwise rule
that out. They were 4.10:1. In fact I didn't know there was ever a 318
with that ratio.

-Russ.