Author Topic: LSD's (Read 15239 times)

thumper3ld · « **on:** March 12, 2006, 09:47:45 AM »

Do medium and large case LSD's fit in our cars w/o modification. If not, what needs to be done to get them in?

kowalski · « **Reply #1 on:** March 12, 2006, 07:22:18 PM »

a medium does, i'm not sure about a large case, i think you need to change the CV's, but i could be wrong.

fabe · « **Reply #2 on:** March 13, 2006, 11:47:18 PM »

the big case can fit w/o any mod. swapped small diff to big diff before...

asubimmer · « **Reply #3 on:** March 13, 2006, 11:49:04 PM »

there are small, medium and large cases, the small and medium fit.
edit: fyi the one in the 318is is a small and 325's medium

fabe · « **Reply #4 on:** March 13, 2006, 11:54:56 PM »

and where did the 'large' case come from? is there one?

asubimmer · « **Reply #5 on:** March 14, 2006, 12:07:16 AM »

Quote from: fabe

and where did the 'large' case come from? is there one?

not from e30's...off hand I can't remember exactly what the larges came on. But its not like it matters since they won't fit

kowalski · « **Reply #6 on:** March 14, 2006, 02:52:48 AM »

Quote from: asubimmer

not from e30's...off hand I can't remember exactly what the larges came on. But its not like it matters since they won't fit

i believe it was the 7 and 5 serries that people use..

i know there is some people running arround with large cases... or im on crack... one of the 2:D

fabe · « **Reply #7 on:** March 14, 2006, 04:36:26 AM »

7 series? of cos that won't fit. btw, as far as I know the internals are the same for the bigger E30 casing and the rest of the BMW rear diff. I've swapped over carriers from E34 to experiment before.
And that the 520i rear diff is almost indentical with E30 big case rear diff except for the rear plate and the output flanges.

2002maniac · « **Reply #8 on:** March 15, 2006, 01:40:01 AM »

Here we go. 4-cyl cars (minus M3) had a small case, 6-cyl cars had medium case, and V8 and V12 cars had the large case.

The medium case diff from an e30 will swap right in. you dont need to change the flanges, axles, or anything. They are quite a bit heavier though.

thumper3ld · « **Reply #9 on:** March 28, 2006, 09:29:27 PM »

Can an LSD from an e30 M3 be used on our cars with no modifications?

dude8383 · « **Reply #10 on:** March 28, 2006, 10:45:10 PM »

yeh im fairly certain of that.

2002maniac · « **Reply #11 on:** March 29, 2006, 12:53:28 AM »

Quote from: thumper3ld

Can an LSD from an e30 M3 be used on our cars with no modifications?

yes. It is heavier though. Small case is plenty strong too.

thumper3ld · « **Reply #12 on:** March 29, 2006, 05:29:19 AM »

I was contemplating getting a 4.10 LSD from an e30 m3 to replace my open 4.10 diff. Think its worth it?

Zoso · « **Reply #13 on:** March 29, 2006, 10:11:39 AM »

I think it's worth it. Unless you got a good deal on the E30 M3 LSD, I'd stick with the small case.

shellback · « **Reply #14 on:** April 01, 2006, 07:15:08 PM »

If I'm not concerned with highway engine noise, what diff do you recommend? Currently have a 4.10 lsd. Heard some talk about convertible lsd's or automatic cars with higher lsd ratios improving acceleration (that is - noticeable acceleration).
Thoughts?
Chris