Question. Small case 4.10 lsd fits on 325 is?

[Groove_D]

I'm looking at buying a 4.10 small case lsd diff. Would it fit on my 325 is? Is it a straight swap or do i need to change the flanges and the rear diff cover?
How much do they usually go for?

Thanks in advance guys.

[02stu]

It'll fit, but it won't last long. I had the same idea on my last e30 and sheared the input shaft to the diff.

[mattdk318i]

change the flanges, ive been using a 4.10 small case on my M50 cab for about 2 years. And it turns 17''s over daily.

[Groove_D]

I have a stock m20 with a 93 mark d chip. You still think it will tear small diff?
By changing the flanges, you mean swap my existing 325 flanges into the 4.10 diff?

[mattdk318i]

no, you need the 318 flanges to reach the 325 axels

[Groove_D]

The guy sells it locally for $200 CDN. So you you think overall i should stay away from the small case diff?

[mattdk318i]

if you can help it, But if you already own one like i did. Throw it in there. It works fine

[Groove_D]

I haven't bought it yet, thinking about. Was the mod worth it?

[Liam]

It will fit but it really is not the best choice for an M20 powered car.

[Julien]

no, you need the 318 flanges to reach the 325 axels

*ahem*bullshit


maybe this is a on a 5 lug car? on a normal e30 you they are both plug and play

[Holland]

Lol, if you can go from small case to medium case with no problem then why would it be a problem to go from medium to small?

[xwill112x]

mattdk, your wrong ;)

anything e30, will work for another e30.

[Collin]

Lol, if you can go from small case to medium case with no problem then why would it be a problem to go from medium to small?

More distance between pieces that should connect easily.

[Julien]

axle shafts have a slip joint that allows enough play to fit either diff

[FredK]

Hm. I didn't realize there's THAT much play in the axles. Why would BMW offer two different diff output flange widths if it didn't make a difference?