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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > M3 LSD installed on my 335i. Lots of pics.



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      06-08-2018, 07:50 PM   #111
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Originally Posted by feuer View Post
I need to educate you on m3 LSD? Beefier isn't necessary stronger and better. Viscous LSD has short life. So yes, hypothetically you can have m3 LSD installed for cheap but chances are it will be old, high mileage unit and if isn't already dead it will soon die from the torquey turbo engine. I wouldn't consider m3 LSD with over 50k. Do the research. Find me low mileage m3 LSD and add up the numbers. Then we can talk.
I got one with 36k miles for $525 shipped

$525 for LSD diff
$200 for axles
$85 for driveshaft
$15 for driveshaft bolts and washers
$250 for driveshaft shortening

$1075 is what I'm into it. That's what I managed just trolling Ebay for parts.
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      06-08-2018, 07:59 PM   #112
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Originally Posted by shanker604 View Post
completely agree ... m3 has 260 torque, thats my torque when im in limp mode lol... dont think that lsd will last too long with 400-500 ish torque
The M3 LSD is shared with M5s and M6s guys....just different ratios...
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      06-08-2018, 08:02 PM   #113
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Quote:
Originally Posted by halik008 View Post
I got one with 36k miles for $525 shipped

$525 for LSD diff
$200 for axles
$85 for driveshaft
$15 for driveshaft bolts and washers
$250 for driveshaft shortening

$1075 is what I'm into it. That's what I managed just trolling Ebay for parts.
Recently? That's dirt cheap. It's getting harder to find at a decent price.
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      06-08-2018, 08:06 PM   #114
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Quote:
Originally Posted by halik008 View Post
I got one with 36k miles for $525 shipped

$525 for LSD diff
$200 for axles
$85 for driveshaft
$15 for driveshaft bolts and washers
$250 for driveshaft shortening

$1075 is what I'm into it. That's what I managed just trolling Ebay for parts.
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Originally Posted by LMB335IS View Post
Recently? That's dirt cheap. It's getting harder to find at a decent price.
Post Ebay links or doesn't count.
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      06-08-2018, 08:21 PM   #115
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Quote:
Originally Posted by feuer View Post
Post Ebay links or doesn't count.

Challenge accepted.....

All but the diff I got lucky to buy them while ebay was doing the 15-20% off promotions.
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      06-08-2018, 09:09 PM   #116
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Challenge accepted.....

All but the diff I got lucky to buy them while ebay was doing the 15-20% off promotions.
Nice! Currently you can't find m3 LSD for less than $8xx.
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      06-08-2018, 10:52 PM   #117
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Has anyone ever tried to fit an f80 diff?
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      06-09-2018, 09:54 AM   #118
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Originally Posted by Aus335iguy View Post
Has anyone ever tried to fit an f80 diff?
That'd be great if possible but I've heard the subframe is totally different.
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      06-09-2018, 02:26 PM   #119
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Quote:
Originally Posted by Aus335iguy View Post
Has anyone ever tried to fit an f80 diff?
Quote:
Originally Posted by LMB335IS View Post
That'd be great if possible but I've heard the subframe is totally different.
Non M F-series have E-series diff but with different rear cover. M3 F-series has front and rear adapter plates to mount on the subframe. So you can mount it on non M subframe but the LSD unit is electronically controlled. This is the reason they are cheaper than E-series m3 LSD. Due to electronics isn't possible to retrofit on another vehicle.
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      06-09-2018, 02:36 PM   #120
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In my view the electronic part isn't that hard and would make for a nice adjustable feature when in sport mode. Any links to anyone that's tried ?
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      06-09-2018, 03:10 PM   #121
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Is the f80 and f30 subframe the same ?
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      06-09-2018, 05:41 PM   #122
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Quote:
Originally Posted by Aus335iguy View Post
In my view the electronic part isn't that hard and would make for a nice adjustable feature when in sport mode. Any links to anyone that's tried ?
Is tied with steering angle position sensor, tilt sensor, abs, traction... All of that. Won't be easy task.
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      06-09-2018, 07:45 PM   #123
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Quote:
Originally Posted by feuer View Post
Quote:
Originally Posted by Aus335iguy View Post
In my view the electronic part isn't that hard and would make for a nice adjustable feature when in sport mode. Any links to anyone that's tried ?
Is tied with steering angle position sensor, tilt sensor, abs, traction... All of that. Won't be easy task.
We could complicate it but a minimum viable product doesnt have to be.
What Im suggesting is that it doesn't need to be constantly variable just needs a fully open and an x amount closed position...
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      06-14-2018, 04:07 PM   #124
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Originally Posted by feuer View Post
'06 have bolted diff so I strongly recommend you to install LSD into your existing diff instead of going the M3 route
I’m not looking to do it for a cheaper option I want the better suspension parts aswell I need to replace some arms anyways and I need an lsd.. am at 365hp at the wheels and around 592nm so not crazy power I wanted to go oem+ with brakes suspension parts and the rest
I spent ages thinking about this and I’ve decided oem+ is the direction I would like to take tbh
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      06-14-2018, 04:13 PM   #125
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Quote:
Originally Posted by feuer View Post
Post Ebay links or doesn't count.
Am from the uk shipping is a pain but I spoke to a salvage yard the other day he said he’d want 1k for the whole subframe with lsd arms and rotas the lot but he had sold the lsd already
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      06-14-2018, 04:22 PM   #126
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Quote:
Originally Posted by feuer View Post
Of course, but unfortunately the forum community is mostly clueless about LSD and price point is the basic determining factor. Installing used m3 LSD that won't work is absolutely OK since most won't be able to tell the difference. They won't consider OS Ginken at all since they can have 3 to 4 used m3 LSD's
Price was not my issue I damaged some of the rear control arms and I knew the m3 arms were a good upgrade however since my cars lowered and has had an slight increase in power 365 to the wheels I’d like to put the power to both wheels and tbh I’d love to make it oem plus I do like 5-6k a year sometimes not even that I don’t track or anything I’d jus like my car to handle
Also m3 brakes etc would be a good investment with power upgrade plus I plan to take some of the weight out the car so less stress on the parts coupled with the fact other than the professional nav I have no extras on my car so far less stress other than a lil more torque than an m3
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      07-05-2018, 05:20 AM   #127
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Quote:
Originally Posted by shoDeee9x335i View Post
Price was not my issue I damaged some of the rear control arms and I knew the m3 arms were a good upgrade however since my cars lowered and has had an slight increase in power 365 to the wheels I’d like to put the power to both wheels and tbh I’d love to make it oem plus I do like 5-6k a year sometimes not even that I don’t track or anything I’d jus like my car to handle
Also m3 brakes etc would be a good investment with power upgrade plus I plan to take some of the weight out the car so less stress on the parts coupled with the fact other than the professional nav I have no extras on my car so far less stress other than a lil more torque than an m3
Have you managed to source anything yet?
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      07-12-2018, 08:14 AM   #128
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Got a few questions if anyone has any answers:
1. I have an e92 2012 335i auto, anyone have the length of the modified drive shaft?
2. Do I need to change any electronics after installing the m3 diff?
3. Does the diff need any balancing?
4. How much power can the e92 m3 diff handle?
5. Do I get the m3 drive shaft auto or manual? does it even matter?

Thanks =)

Last edited by Chris1337; 07-12-2018 at 08:30 AM..
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      09-13-2018, 04:18 AM   #129
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Originally Posted by Chris1337 View Post
Got a few questions if anyone has any answers:
1. I have an e92 2012 335i auto, anyone have the length of the modified drive shaft?
Youre going to have to measure it yourself during the install. From what I’ve seen: there are slight variations in required driveshaft length and it’s honestly safer to get your exact measurements on the fly instead of shotgunning the length and potentially ending up with a driveshaft that won’t work/too short/too long

2. Do I need to change any electronics after installing the m3 diff?
The differential has no electronics attached to it (absolutely beautiful, BMW) and so will work plug and play but it is a good idea to code out the factory e-diff function in the 335i as you now have a mechanical rear LSD working for you and the e-diff will only serve to interfere with the LSD while driving

3. Does the diff need any balancing?
Some diffs (rarely) require special balancing bolts from the factory; there are previous posts that cover this issue extensively. The M3 diff is tagged if it requirE balancing and will have notches on the input flange where the specialty balancing bolts need to be. In my experience, most Diffs are usually White-Label diffs and do not require specialty hardware; I have yet to encounter a specialty-balancing LSD in the wild

4. How much power can the e92 m3 diff handle?
500rwtq is where you really start to push the internals of the diff beyond a it’s limits; you will burn up the internals quick. It’s best to rebuild/reinforce the diff with upgraded internals of power goals are anything above 500rwtq. M3 guys run superchargers that give the S65 400-450tq so if all you’re doing is FBO; you’ll be fine. You’ll burn up internals before you ever snap anything else on the case as its absolutely massive compared to the 335i. Would strongly consider upgraded internals for Single Turbo builds

5. Do I get the m3 drive shaft auto or manual? does it even matter?
I want to say no as you’ll have to shorten the M3 front halfshaft and weld the 335i transmission flange to it anyway but don’t quote me on that as I only have experience with 6MT LSD swaps

Long time lurker over this thread and just wanted to chime in and say that these swaps are still available pretty cheap; I’ve found entire M3 rear ends for $2000 or less and that includes everything needed for the swap plus rear M3 subframe, springs, shocks, wishbones, arms, sway bar, and brakes. I would strongly suggest finding a donor or contacting a specialty BMW salvage yard that has a complete donor to pull from and will let you inspect/observe the removal; that way you know you’ve grabbed everything and you don’t nickel and dime yourself to death with hardware/misc stuff. I managed to pick up a swap for my personal car with only 36k miles for $1500 from a local BMW specialty yard and will probably be looking at an even cheaper investment after I sell off the misc parts I won’t be using

Honestly best bang-for-the-buck LSD swap and much more bugdetarily friendly than brand new 335i Aftermarket LSD and Aftermarket Axles. Would fully recommend for daily driving/occasional AutoX use; plus the upgraded axles, beefier housing, and massive heatsink are a huge bonus. I’ve driven behind many M3s before and the heatsink is so large and noticeable from fairly far away; it’s that big; definitely feel secure having that thing sit back there

Aftermarket stuff is always an option however if you’re looking to put down serious dyno-killing power; but then you could always look into aftermarket M3 stuff anyway and enjoy the benefits of both worlds

Cheers ya’ll
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      12-17-2018, 12:54 PM   #130
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sorry to revive a old thread. So with the addition of the new xdelete app that released last week. Can we do this swap on a 335xi with no problem? I would imagine its the same swap other than more shortening of the drive shaft to fit into the xfer case. After the swap code out the e-diff. Did 335xi's maybe just become mini F90 M5's?
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      04-15-2019, 03:34 AM   #131
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Can us awd do this?
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      11-18-2019, 07:02 PM   #132
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Yes, but you'd need to get internals for the diff so that the final drive ratio exactly matched your stock ratio.
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