Questions about 3.91 differential...

[MR 325]

What did it come in? I guess I should probably know the answer to this but I don't.

[Julien]

euro 325i Sport in LSD form.. other than that, ix in visco

[mikeedler]

I have never seen a 3,91 in a 325i Sport-- just in 325ix- and I did have a small housing 3,91 reg. sperre- but not sure what it came out of, kinda think it was a 318 wagon or some crap.
the 325i cars here had either the 3,64s-- early no cat cars- or the 3,73s(from what Ive seen anyway.

[cferb]

Some US cars came with them, I think it was some of the 325i verts or something, it's rare though in non viscous.

I have one :p

[SpecM]

I think, small-case in 90-91 318i (non-is) and med-case 325ix

[cferb]

found this

http://www.r3vlimited.com/Tech/breakdown.htm

Not terribly specific

[BeirBrennerE30]

not sure but it was definitely available in the US in LSD form for the e30.

Call Dan at diffsonline. Thats who I got my 3.91 from and he usually has all kinds of e30 diffs lying around new or used

[Lsb_E30]

I believe you can find a 3.91 in a medium case. My guess would be an E34 6cyl model diff.

I went from a 4.10 in my 91 318is to a 3.73 and I think its perfect, what do you have now?

[cferb]

Kinda OT, is the stock 3.73 in a 325i medium case? Because my 3.91 is the same. I <3 it, one of my favorite, but most expensive parts.

[z31maniac]

^Yes.

[BenM]

Large Case came in all US M5/M6.

[euroshark]

Some E24 autos had 3.91s... I have a very nice, low mileage 3.91 open if anyone is interested...

Edit: This would be a medium case diff.

[Maluco]

euro 325i Sport in LSD form.. other than that, ix in visco

4:10 is working on my nerves, speeding tickets and fuel!!! 3:91 LSD please, kthxbai.

[CleanAzzE30z]

3.91 looks like a great compromise.


Mariano

[Kingb]

I have never seen a 3,91 in a 325i Sport-- just in 325ix- and I did have a small housing 3,91 reg. sperre- but not sure what it came out of, kinda think it was a 318 wagon or some crap.
the 325i cars here had either the 3,64s-- early no cat cars- or the 3,73s(from what Ive seen anyway.

I have 2 325i euro and they both have 4.10's in them. I have been checking the junk yards for a couple years and can only find 4.10's until yesterday found a 3.91 in an iX.

What is viscous and non viscous,? I never heard of this before