I should wait until the more experienced people come in to comment, but as far as I know the minimum that you would need would be the m3 rear subframe as that is the only way you can actually mount it, and a different driveshaft than you have right now so that it is the correct length to match it.

 

So would I have to cut out any part of the body to put in the subframe? Or can you swap it somewhat easily?


Sent from my iPhone using E46Fanatics

 

So would I have to cut out any part of the body to put in the subframe? Or can you swap it somewhat easily?

when they said “subframe“ they meant the differential cage/carrier.
there are pros and cons swapping in an M3 diff. one major point is that it’s a 3.62:1 ratio. which is pretty short gearing. this works fine for the M3 that has an 8,100 rpm redline and an overdriven 6th gear transmission. without these it’s gonna be short and a buzz bomb.

 

M3 subframe, diff, axles, etc., all bolt right up. Driveshaft needs to be changed. Many on here have done the swap. Did you search?
Try this Google phrase: ***8220;m3 diff swap site:e46fanatics.com***8220;

 

I’ve done a little bit of research but this seemed like a good place to start for the logistics. Thank you


Sent from my iPhone using E46Fanatics

 

What is the to go aftermarket option to LSD your non M diff that is already in your car?

 

M factory diffs , good price and you may be able to participate on a group buy
quaife is totally overpriced imho
search in the forum ,there are many reviews

 

Yes, it's possibe. The previous owner of my ZHP swapped an M3 rear-end in the back of my car. The thread is around here somewhere...

*Original Thread*

https://forum.e46fanatics.com/showthread.php?t=800207#/topics/800207?page=6

Everything was a direct bolt with the original ZF 6 speed and 330i wheel hubs/brakes, including the driveshaft and axles.

The axles were the tricky part for him. They fit, but it wasn't without a brief war. After several hours of fighting them, he had to persuade them a bit by torch heating the hubs just enough to fit the axles, while being careful not to overdue it e.g. ruining the hubs and bearings.


My ride:
3.62 M LSD and Sub Frame
ZF 6 Speed
M3 Driveshaft
M3 Axles
M3 Rear Swaybar
330i Hubs/Brakes/Suspension