3.15 Differential?

[bdi_fc]

I'm considering swapping my 3.73LSD for a 3.15LSD. But I'm curious which e30s came with a 3.15LSD. Anyone know?

I want to make sure because a guy I know is offering to sell me a 3.15LSD for $300 and says it will drop right into the e30.

Thanks in advance.

[SchnellerVert]

3.15:1 sounds like an E36 rear ratio, 3.25:1 is the more commonly used with a E36 or E34 gearbox.

[LINUS]

How about a 3.23 from like a M roadster - gets you a finned diff cover too.

Call Joe, he'll hook you up.

[SchnellerVert]

Is it the Viscous unit? M roadsters had 2 differant styles.

[bdi_fc]

How much would Joe sell one for? Do I have to change any of the covers or anything?

[BrandC]

3.15 was an E36 ratio, not available in any E30/28 series vehicles I think.

[ian332isport]

Euro spec M3 Sport Evo came with a 3.15, as did the Euro ZM Coupe. Not sure if either of these made it across the pond though.

Ian.

[James Crivellone]

How about a 3.25LSD from a E28 535iS?

[bdi_fc]

How about a 3.25LSD from a E28 535iS?

If I can get it in my e30 for under $300.

[MR 325]

If I can get it in my e30 for under $300.

I have one in my 85 that I'm looking to swap out for a 3.73 or 4.10. It makes a little noise though, still works great. If you're ever in the La Crescenta area you could take it for a spin and see if you are interested. Already has the E30 cover of course.

[Mot]

I got my 3.25lsd with 83k miles for 175 shipped. But I think I got a killer deal.

[bdi_fc]

I have one in my 85 that I'm looking to swap out for a 3.73 or 4.10. It makes a little noise though, still works great. If you're ever in the La Crescenta area you could take it for a spin and see if you are interested. Already has the E30 cover of course.

Did you change the fluid?

[MR 325]

Did you change the fluid?

Yes it has brand new factory BMW fluid in it. I watched it get put in at the dealer.

[MR 325]

I got my 3.25lsd with 83k miles for 175 shipped. But I think I got a killer deal.

You did, that's cheap!

[LINUS]

Is it the Viscous unit? M roadsters had 2 differant styles.

To be honest, I have no clue. I just asked Joe for a LSD rearend that was taller than my 4.10 , and this is what he had that was as good as any for my swap project. Price was right, and if I want or need another ratio, I'll cross that bridge when I get there.