BMW M Performance LSD for 335i and 435i. Pricing and Technical FAQ.

Boostedphil698 · 05-08-2020, 11:20 AM

Quote:

Originally Posted by mholder

I don't know about the 335i/435i but I just had the M Performance LSD installed in my AT 2017 340i in January 2020 and absolutely love it. It has completley transformed the handling. I also have the MPPSK and M Performance Suspension.

Unfortunately, BMW discontinued the LSD for the automatic transmissions 335i/435i.

Jvac · 05-08-2020, 12:58 PM

Here's a recent post of a forum member who did the wavetrac
https://www.bimmerpost.com/forums/sh...php?p=25898738

aps · 05-15-2020, 04:36 PM

Only put 150 miles on it, but the stability at high speeds has been pretty incredible. Just highway driving so far, but so much easier to take these big sweeping turns at 90+. Can't wait to start pushing it in the canyons.

Polo08816 · 05-17-2020, 03:48 PM

Quote:

Originally Posted by aps

Only put 150 miles on it, but the stability at high speeds has been pretty incredible. Just highway driving so far, but so much easier to take these big sweeping turns at 90+. Can't wait to start pushing it in the canyons.

Your limited slip differential is providing you greater stability at higher speeds on a highway? Maybe if you have 2000 horsepower and can break traction at 80mph.

aps · 05-17-2020, 04:12 PM

Quote:

Originally Posted by Polo08816

Quote:

Originally Posted by aps

Only put 150 miles on it, but the stability at high speeds has been pretty incredible. Just highway driving so far, but so much easier to take these big sweeping turns at 90+. Can't wait to start pushing it in the canyons.

Your limited slip differential is providing you greater stability at higher speeds on a highway? Maybe if you have 2000 horsepower and can break traction at 80mph.

didn't mean in a straight line. as I said around big curves. maybe it's just more of a confidence in feeling thing.

itsrichierich · 06-24-2020, 01:41 PM

If anyone has one for sale in Socal for a F30 335i RWD auto transmission, let me know

Logicoeur · 06-28-2020, 10:25 PM

Quote:

Originally Posted by itsrichierich

If anyone has one for sale in Socal for a F30 335i RWD auto, let me know

Rwd and xdrive use the same lsd part #. Just matters between auto and manual transmission. Good luck with the search

itsrichierich · 06-29-2020, 11:41 AM

Quote:

Originally Posted by Logicoeur

Rwd and xdrive use the same lsd part #. Just matters between auto and manual transmission. Good luck with the search

Thanks for the heads up, didn't know that. Got an auto trans here.

Logicoeur · 01-24-2021, 06:26 PM

Quote:

Originally Posted by JT50

I know you can get it as part of the dynamic handling package, But Does anyone know if you can get the M-Sport Diff or any other LSD for the G20 330i So far I haven't been able to find anything

Wrong forum to ask. We all have the F series

Paintballover · 03-11-2021, 03:56 AM

Quote:

Originally Posted by Gio72

An 80% locking is harder to manage and not for all drivers.
Anyone knows the price of MP LSD in Europe?

Same issue

tphss · 10-16-2021, 12:56 PM

Does anyone know if the new part number of the LSD 33-10-8-659-989 fits the N55 435i with automatic transmission?
The original 33107555607 is discontinued for years now.

The only other option I see for N55 F30/32 seems to be aftermarket diff builders that use a non-oem diff (Wavetrac, Quaife etc) and you need to send them your original core (differential).

rallas · 11-12-2021, 06:56 AM

Quote:

Originally Posted by tphss

Does anyone know if the new part number of the LSD 33-10-8-659-989 fits the N55 435i with automatic transmission?
The original 33107555607 is discontinued for years now.

The only other option I see for N55 F30/32 seems to be aftermarket diff builders that use a non-oem diff (Wavetrac, Quaife etc) and you need to send them your original core (differential).

I am wondering the same thing. From what I can tell it looks like this one has 3.08 ratio versus 3.15 of the factory diff or the old 33107555607 diff.

What is the impact of the slight difference in ratio other than the ~2% difference in indicated speed? Will the DME freak out and throw codes?

F32Fleet · 11-12-2021, 11:34 AM

Quote:

Originally Posted by rallas

Quote:

Originally Posted by tphss

Does anyone know if the new part number of the LSD 33-10-8-659-989 fits the N55 435i with automatic transmission?
The original 33107555607 is discontinued for years now.

The only other option I see for N55 F30/32 seems to be aftermarket diff builders that use a non-oem diff (Wavetrac, Quaife etc) and you need to send them your original core (differential).

I am wondering the same thing. From what I can tell it looks like this one has 3.08 ratio versus 3.15 of the factory diff or the old 33107555607 diff.

What is the impact of the slight difference in ratio other than the ~2% difference in indicated speed? Will the DME freak out and throw codes?

IIRC vehicle speed is read at the transmission output shaft. Now would the difference in the diff ratio impact stability control? I don't know.

SuperLomi · 11-12-2021, 01:17 PM

According to realOEM, the 33108659989 part number is a 2.81 final drive ratio.

Also, drive shaft for the pre-vs post LCI car's are different - 435i = 1509mm, 440i = 1504mm.

Axle shafts are also different part numbers between pre- and post LCI automatics. It seems like LCI made the axles common between auto/manual and manual pre-LCI, but pre-LCI auto have a unique part number.

So the known issues with putting a manual diff into an automatic are driveshaft length is different, and axle shafts are different length, and some dust seals are different. Based on that known incompatibility, I believe this part number will not work for pre-LCI automatics, without additional parts being changed, or potentially custom work being done.

DaReTo · 09-15-2023, 08:37 PM

I have the 2013 n55 f30 just before launch control[tried it just made a bad smell lol]
uprated air flow for intake and intercooler,dropped plugs to 1step colder iridium,replaced v/c {leaking}and remapped ots with a carbon clean...whats peeps opinion 76k..wanna look after this girl

rlesko · 02-01-2024, 04:31 PM

Managed to pick up a used M perf LSD, seller said had about 40k miles on it. I'm planning to drain and fill with new fluid, but is there any other maintenance I should be aware of or consider doing? It is off the car so now would be the easiest time.

morpheusro · 05-06-2025, 06:08 AM

Hi everybody, reviving this old thread with a q: do we have any indication on part number for a replacement for the M Performance LSD for the 335i automatic?

Found some interesting options from m2, m4, but I am not sure if they fit. What I was thinking is that maybe an LSD from a different car is a direct fit. Thanks!

rlesko · 05-06-2025, 10:14 AM

Quote:

Originally Posted by morpheusro

Hi everybody, reviving this old thread with a q: do we have any indication on part number for a replacement for the M Performance LSD for the 335i automatic?

Found some interesting options from m2, m4, but I am not sure if they fit. What I was thinking is that maybe an LSD from a different car is a direct fit. Thanks!

The 335i/435i LSD part number is in the first post of the thread. There is no "replacement" or part number which supersedes what is already listed.

F8x cars use an electronic differential, it may not be swapped onto F3x. To my knowledge no one to this date has undertaken retrofitting an F8x differential onto F3x.

Popular mechanical options for the F3x platform are quaife or wavetrac LSDs.

05-08-2020, 12:58 PM	#222
Jvac Captain 466 Rep 834 Posts Drives: 2015 335i rwd Join Date: Jan 2019 Location: Usa iTrader: (1)	Here's a recent post of a forum member who did the wavetrac https://www.bimmerpost.com/forums/sh...php?p=25898738 __________________ 335i rwd auto, 2015 with m performance LSD and Dinan stage 2. Cts charge pipe, mad 5" stepped intercooler.
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05-15-2020, 04:36 PM	#223
aps Captain 346 Rep 981 Posts Drives: 2018 M3 ZCP Join Date: Apr 2016 Location: NC iTrader: (6)	Only put 150 miles on it, but the stability at high speeds has been pretty incredible. Just highway driving so far, but so much easier to take these big sweeping turns at 90+. Can't wait to start pushing it in the canyons. __________________ 2018 Azurite Black F80 M3 ZCP 2019 Phytonic Blue G05 X5 2013 Glacier Silver F30 335i (sold)
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06-24-2020, 01:41 PM	#226
itsrichierich Moto Lover 217 Rep 642 Posts Drives: '19 BMW S1000XR Join Date: Jun 2020 Location: San Diego, CA Instagram - @itsrichierich23 iTrader: (0)	If anyone has one for sale in Socal for a F30 335i RWD auto transmission, let me know Last edited by itsrichierich; 06-29-2020 at 11:41 AM..
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10-16-2021, 12:56 PM	#231
tphss das Eichhörnchen 52 Rep 279 Posts Drives: e92 M3, F32 435xi Join Date: Oct 2012 Location: Florida iTrader: (0)	Does anyone know if the new part number of the LSD 33-10-8-659-989 fits the N55 435i with automatic transmission? The original 33107555607 is discontinued for years now. The only other option I see for N55 F30/32 seems to be aftermarket diff builders that use a non-oem diff (Wavetrac, Quaife etc) and you need to send them your original core (differential).
	Appreciate 0 Quote

11-12-2021, 01:17 PM	#234
SuperLomi First Lieutenant 212 Rep 383 Posts Drives: 2013 335i M-Sport Join Date: Nov 2020 Location: KY iTrader: (0)	According to realOEM, the 33108659989 part number is a 2.81 final drive ratio. Also, drive shaft for the pre-vs post LCI car's are different - 435i = 1509mm, 440i = 1504mm. Axle shafts are also different part numbers between pre- and post LCI automatics. It seems like LCI made the axles common between auto/manual and manual pre-LCI, but pre-LCI auto have a unique part number. So the known issues with putting a manual diff into an automatic are driveshaft length is different, and axle shafts are different length, and some dust seals are different. Based on that known incompatibility, I believe this part number will not work for pre-LCI automatics, without additional parts being changed, or potentially custom work being done.
	Appreciate 1 Logicoeur1006.50 Quote

09-15-2023, 08:37 PM	#235
DaReTo ots mods mst air,wagner ic,stage1 ots tune 0 Rep 1 Posts Drives: 335I mperformance Join Date: Sep 2023 Location: north london iTrader: (0)	I have the 2013 n55 f30 just before launch control[tried it just made a bad smell lol] uprated air flow for intake and intercooler,dropped plugs to 1step colder iridium,replaced v/c {leaking}and remapped ots with a carbon clean...whats peeps opinion 76k..wanna look after this girl
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02-01-2024, 04:31 PM	#236
rlesko Captain 401 Rep 781 Posts Drives: F30 335i Join Date: Jan 2023 Location: New England iTrader: (1) Garage List 2020 X5 [0.00] 2012 335i [0.00]	Managed to pick up a used M perf LSD, seller said had about 40k miles on it. I'm planning to drain and fill with new fluid, but is there any other maintenance I should be aware of or consider doing? It is off the car so now would be the easiest time. __________________ Performance Mods: Eibach Sway Bars, KONI SA Dampers, M Perf Rear Brakes, MSTv2 Turbo Inlet, Akrapovic Evolution Exhaust, Fabspeed Catted Downpipe, MHD/xHP Stage 2 Retrofit: Reversing Camera (3AG), Rear PDC (507), Front PDC (508), NBT Evo (from CIC), Active Cruise Control (5DF)
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05-06-2025, 06:08 AM	#237
morpheusro New Member 3 Rep 25 Posts Drives: BMW 335i F30 Join Date: May 2023 Location: Utrecht NL iTrader: (0)	Hi everybody, reviving this old thread with a q: do we have any indication on part number for a replacement for the M Performance LSD for the 335i automatic? Found some interesting options from m2, m4, but I am not sure if they fit. What I was thinking is that maybe an LSD from a different car is a direct fit. Thanks!
	Appreciate 0 Quote