LSD on Xdrive. yes or no?

darkfaker · 03-28-2015, 04:27 PM

can i put LSD on my xdrive? is it worth it ? front or rear?

overcoil · 03-28-2015, 04:59 PM

LSD is listed under 235ix accessories for the rear wheels.

boost82 · 03-31-2015, 02:29 AM

Your car already has differentials. That's exactly what makes it AWD

Killramos · 03-31-2015, 08:12 AM

Quote:

Originally Posted by boost82

Your car already has differentials. That's exactly what makes it AWD

Yea because most cars dont have differentials

Physically speaking there is no reason why you cant put a rear LSD into an AWD car. In fact the car will perform awesomely with it. Thats what the sport diff on the audi S5 does. The STI has front and rear LSD's if i am not mistaken. I imagine most awd supercars do as well though i dont actually know that.

The problem you have is that xDrive makes more extensive use of the ESP system ( individual wheel breaking etc) in order to optimize awd traction that their RWD cars do. For this reason the LSD might interfere with the operation of the xdrive system.

Basically you need to talk to someone with real knowledge at BMW before you try it.

Also its fairly likely the front diff wont fit so rear only.

quenotte · 03-31-2015, 08:43 AM

M Performance LSD is not available on BMW ETK for xdrive cars... Only RWD M235i can have it, not AWD M235i xdrive...

Zooks527 · 03-31-2015, 08:48 AM

Quote:

Originally Posted by darkfaker

can i put LSD on my xdrive? is it worth it ? front or rear?

Yes, you can. An LSD on the rear end won't interfere with the electric LSD function of the car. It's been done multiple times with no problems. BMW will install one of theirs at the VPC for you if you put it in at time of order or if you ask your dealer for it later. Pricey little sucker, though.

In order to answer "Is it worth it?", you'll need to provide more information as to what you intend to do with the car. Are you going to track it? Might be worth it in that case. Are you just planning on driving around on city streets with a set of all-seasons hoping it will help in the snow? Probably not worth it in that case.

Quote:

Originally Posted by quenotte

M Performance LSD is not available on BMW ETK for xdrive cars... Only RWD M235i can have it, not AWD M235i xdrive...

This is not correct. The LSD is a Port Installed and Dealer Installed option for the M235xi.
http://www.shopbmwusa.com/PERFORMANC.../DIFFERENTIALS

williesm · 03-31-2015, 09:22 AM

Its something i also thought about and wondered even if possible.

I assume it is possible but i think the benefit will really only be seen on the lockup on deceleration. Locking up the rears prob wouldn't be as necessary, as the front engages when needed, unless you plan on drifting.

So the only reason I would see it helping is drifting and helping understeer on deceleration. You will never feel this on the streets.

quenotte · 03-31-2015, 10:35 AM

Quote:

Originally Posted by Zooks527

This is not correct. The LSD is a Port Installed and Dealer Installed option for the M235xi.
http://www.shopbmwusa.com/PERFORMANC.../DIFFERENTIALS

LSD may be port installed but it's not in M235xi ETK so you may have some difficulties to have it dealer installed if they don't find the part number in the ETK for your xdrive VIN...

RWD and AWD M235i share the same rear differential so there is no reason that LSD cannot be installed in AWD.

In the M Performance LSD press release, it was claimed that only RWD car will have the ability to be retrofitted with M Performance LSD...

Maybe it's an ETK error. For example, until 2015 March edition, M Performance LSD was only available for 2TB sport auto transmission and not manual gearbox on M235i...

x233 · 12-28-2015, 09:43 PM

OK, so has anyone actually tried installing the M Performance LSD, or any other mechanical LSD for that matter, in their m235i xDrive yet?

(hate to be the first one and learn the hard way).

Transfer · 12-29-2015, 01:19 AM

After driving my xdrive for 5 months, I can't imagine how it could improve upon the current system, especially for the $$$$ it costs.

x233 · 12-29-2015, 05:23 AM

Quote:

Originally Posted by Transfer

After driving my xdrive for 5 months, I can't imagine how it could improve upon the current system, especially for the $$$$ it costs.

I suspect it could changes things a bit. In that price range it's not an issue and not the point.

pikcachu · 12-29-2015, 06:20 AM

Quote:

Originally Posted by Transfer

After driving my xdrive for 5 months, I can't imagine how it could improve upon the current system, especially for the $$$$ it costs.

The lsd will be able to transfer torque side to side before the wheels start slipping

Xdrive will try to mimic that but once a wheel starts slipping, a few ms later it will apply the brakes on that wheel and some of the torque would be pushed to the opposite wheel

Similar to how the eLSD works on DSC OFF mode. Using the brakes to go faster is not the most efficient way to do it but in lack of a real lsd is probably the closest thing for preventing torque being wasted on a slipping wheel

Also because the xdrive pushes power to all the axels it's less likely that you will get a slipping wheel

M_spiels · 12-26-2018, 12:23 PM

Has anybody attempted this since the release of xdelete. I just went rwd and would love to put an LSD in so i can have more fun going sideways but i will want to be able to switch back and forth to awd and rwd. If i put an lsd in and it works in rwd do u think it will work in awd?

vandridine · 12-26-2018, 01:59 PM

Quote:

Originally Posted by M_spiels

Has anybody attempted this since the release of xdelete. I just went rwd and would love to put an LSD in so i can have more fun going sideways but i will want to be able to switch back and forth to awd and rwd. If i put an lsd in and it works in rwd do u think it will work in awd?

xDelete has not been released for the f22 platform yet.

03-28-2015, 04:27 PM	#1
darkfaker Private First Class 26 Rep 106 Posts Drives: M235I Join Date: Nov 2014 Location: CANADA iTrader: (0)	LSD on Xdrive. yes or no? can i put LSD on my xdrive? is it worth it ? front or rear?
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03-28-2015, 04:59 PM	#2
overcoil Major General 3074 Rep 5,577 Posts Drives: M235i 6spd Join Date: Dec 2013 Location: Mid-Atlantic iTrader: (0)	LSD is listed under 235ix accessories for the rear wheels.
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03-31-2015, 02:29 AM	#3
boost82 Private First Class 34 Rep 171 Posts Drives: M235i Join Date: Aug 2014 Location: New York iTrader: (0)	Your car already has differentials. That's exactly what makes it AWD
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03-31-2015, 08:43 AM	#5
quenotte Private First Class 60 Rep 199 Posts Drives: F87N M2 Competition Join Date: Oct 2014 Location: France iTrader: (0)	M Performance LSD is not available on BMW ETK for xdrive cars... Only RWD M235i can have it, not AWD M235i xdrive...
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03-31-2015, 09:22 AM	#7
williesm Private 23 Rep 64 Posts Drives: m235i Join Date: Mar 2015 Location: nj iTrader: (0)	Its something i also thought about and wondered even if possible. I assume it is possible but i think the benefit will really only be seen on the lockup on deceleration. Locking up the rears prob wouldn't be as necessary, as the front engages when needed, unless you plan on drifting. So the only reason I would see it helping is drifting and helping understeer on deceleration. You will never feel this on the streets. Last edited by williesm; 03-31-2015 at 12:42 PM..
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12-28-2015, 09:43 PM	#9
x233 Lieutenant 284 Rep 566 Posts Drives: M2C, M235xi Join Date: Jun 2015 Location: Ukraine iTrader: (0)	OK, so has anyone actually tried installing the M Performance LSD, or any other mechanical LSD for that matter, in their m235i xDrive yet? (hate to be the first one and learn the hard way).
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12-29-2015, 01:19 AM	#10
Transfer Major General 5254 Rep 5,874 Posts Drives: Bronco Wildtrak, Tesla MYP Join Date: Mar 2010 Location: Issaquah, WA iTrader: (1)	After driving my xdrive for 5 months, I can't imagine how it could improve upon the current system, especially for the $$$$ it costs.
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12-26-2018, 12:23 PM	#13
M_spiels New Member 6 Rep 7 Posts Drives: ‘13 e92 n55 335xi Join Date: Feb 2018 Location: Long Island, NY iTrader: (0)	Has anybody attempted this since the release of xdelete. I just went rwd and would love to put an LSD in so i can have more fun going sideways but i will want to be able to switch back and forth to awd and rwd. If i put an lsd in and it works in rwd do u think it will work in awd?
	Appreciate 0 Quote