Auto diff for a 5 spd diff

[Van Westervelt]

I have a 5spd. Looking to swap to a LSD. Does it have to be from another 5spd or can I use a diff from an automatic?

[Streetspec_iS]

yes

make sure to top up the blinker fluid too.

[Van Westervelt]

Hey now! I know that one! I just know that there are a few different cases out there on e30 diffs. 318's have a smaller case than the 325 etc. Just wanted to see if there were any known differences from the auto or not.

[Rigmaster]

no difference between auto + manual as far as fit, etc.

The 6 cyl E30's use a "medium" case diff, 4 cyl E30's (except M3) use "small" case diff. They are interchangeable, but some say the small case diff is not as strong as the medium case..........

E28 5 series diffs are also a direct fit, once you swap the rear cover + side flanges (they just pop out + in).

Bret.

[Streetspec_iS]

just messing man. only differen ce between the two might be ratio's, but fitment is the same.

[Van Westervelt]

I've had 2 m42's so I can't hate! You can get them good and tossed, especially the "is!" I am pickin up a 4.10 LSD to put in my 325i. Quick. THanks for your help guys!