BMW Z3M Diff.. Will it fit E30

[mtlbloodshot]

right, since the 318is uses the same CV shafts as the 6cyl cars, but the diff is narrower, they made the output flanges wider to make up the difference.

NANDO, you're the only one who understands me. Basically you're confirming that the output flanges from the 318is are "longer" because they use a smaller case but the same axles

[nando]

right, since the 318is uses the same CV shafts as the 6cyl cars, but the diff is narrower, they made the output flanges wider to make up the difference.

[Roysneon]

Basically you need output flanges from a 6 cyl e30.

[10Toes]

[agile30]

Your 318is uses a small case differential. The flanges you need are from a medium case differential in the 325s and shit like that. His analogy just was saying it wouldn't work even though it was a bad analogy to begin with.

[mtlbloodshot]

Small case flanges in a medium case diff is like a hoverboard on water.

Maybe I'm burnt but I don't get what you mean by that

[10Toes]

Small case flanges in a medium case diff is like a hoverboard on water.

[mtlbloodshot]

You did use flanges out of Med case E30 diff not ones out of the 318is small case right? because those are different.

I'm using the ones from my 4.10. 318is uses a small case?
Looking at a build from
Jack Benny, he mentions that he uses his stock flanges

[10Toes]

The fit and slide in fine. I actually hear them snap in and lock. It's just that they poke out further then the Z3M flange. I hope its normal and that the M20 axles are shorter

You did use flanges out of Med case E30 diff not ones out of the 318is small case right? because those are different.

[mtlbloodshot]

Z3 M's have bigger CV shafts

I haven't seen one in person with the stubs swapped but the cases are the same. it should be fine. perhaps you didn't push them in far enough?

The fit and slide in fine. I actually hear them snap in and lock. It's just that they poke out further then the Z3M flange. I hope its normal and that the M20 axles are shorter

[nando]

Z3 M's have bigger CV shafts

I haven't seen one in person with the stubs swapped but the cases are the same. it should be fine. perhaps you didn't push them in far enough?

[SHunter]

I don't know if this applies to your situation or not but I used a 3.15 Z3 diff from a non-M car in my swap. I didn't change axles or stub axles, I just put it in. I've done this twice and never needed to swap anything. Maybe the M cars have a different bolt pattern though?

[10Toes]

Yeah the half shafts are different lengths for the E30 vs Z3m or the bolt pattern might also be different but I'm not 100% sure.

[mtlbloodshot]

The one on the right is missing the dust shield.

Ohhh I thought it was one solid piece.. Now that you mentioned it, I checked realoem and you're right.

Can you help me with my first question about the e30 flanges sticking out more?

[10Toes]

The one on the right is missing the dust shield.