3.15 Differential?

[SchnellerVert]

one is a Torsen the other is a normal style like we have.

http://www.bimmerfest.com/forums/forumdisplay.php?f=7

[LINUS]

one is a Torsen the other is a normal style like we have.

http://www.bimmerfest.com/forums/forumdisplay.php?f=7

I doubt it's a torsen, I seem remember it acted like an open diff in my buddy's car, until wheelspin induced lockup, correct? My drive cuffs aren't completely open as it lays on the floor in the garage, so I expect it's a VC style then.

[Beau B]

I ran an 3.15 with my old car and an S50 it was a good all around gear.

[Mr.SWISS]

Well I swapped out the diff last night from a 4.10 open to a S3.25 out of an E28 535is auto. I must say it was a pain in the ass lining up the four bolt holes on the subframe.
What a difference! It actually feels great on the pull and revs are 3,200@70mph. I also removed that vibration damper thing since it was rubbing on the shift linkage. I hope to post some good #'s















MPG that is. :p

[1990m3]

I also removed that vibration damper thing since it was rubbing on the shift linkage.

I hope you're not talking about the driveshaft guibo. you need that part. which part exactly are you talking about?

[Mr.SWISS]

I hope you're not talking about the driveshaft guibo. you need that part. which part exactly are you talking about?

The round metal ring attached to the driveshaft. I know better than to remove the flex disc, I did do the M50 swap ya know. ;)

[DaN]

Anyone know what is required when swapping the Mcoupe 3.15 diff from an s54 car into an e30? Will the stub/output shafts slide into and bolt up to the diff?
Will the pinion flange from the e30 fit onto this diff?
Will the speed sensor pickup work the same?
Here are pics of the M diff.

[gobuffs]

Anyone know what is required when swapping the Mcoupe 3.15 diff from an s54 car into an e30? Will the stub/output shafts slide into and bolt up to the diff?
Will the pinion flange from the e30 fit onto this diff?
Will the speed sensor pickup work the same?

Reuse the output flanges from your diff and it will be plug and play. You might need to swap the speed sensor as well.