E30 diff conversion.. 3.25LSD to 3.91LSD

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Brdjo
E30 Zone Newbie
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Post Wed Apr 06, 2016 7:18 pm

I have two small case diffs, one is 3.25LSD, and other is open 3.91..

What is the safest way to make 3.91 LSD..?
Swap LSD unit from 3.25 to 3.91, or swap pinion and gear?

I heard that the tolerance is so sick precision in there, some info on this will be nice.. :) has anyone done this?
Yeti
Old Skooler
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Post Thu Apr 07, 2016 11:11 am

swap ring a pinion on to LSD mate but setting up can be a bitch as if you get it wrong it wont last long. think i remember someone on here refurbishing them or setting them up but cant remember who?
Topblag
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Post Thu Apr 07, 2016 11:24 am

Gareth.
1990 325i Cab auto in Alpine White II
1988 Alpina C2.5 moredoor in Black, 71k
1990 325ix, moredoor auto in Laser Blue. 51k
1984 Hartge H35 in Black
2004 996 C4S in Silver 43k manual
2006 Audi S6 V10 in Black 58k