LSD for AT cars?

Swimjim · 12-22-2015, 06:53 AM

question... is there an LSD for AT 128's? if not, why not?

Bimmer-Bob · 12-22-2015, 08:05 PM

Quote:

Originally Posted by Swimjim

question... is there an LSD for AT 128's? if not, why not?

No reason why you guys couldn't get an LSD. You might have a different pumpkin size, but that would be the only difference.

Swimjim · 12-23-2015, 04:10 AM

thanks. i asked because i have seen LSD's for manuals and wondered why there would be a difference.

RoundelM3 · 12-23-2015, 09:06 AM

Only difference I could see would be the final drive ratio - usually is a bit higher numerically for automatics than for manuals. I would think any supplier of LSDs could set you up with any ratio you want.

Maximo44 · 12-24-2015, 07:46 PM

A real LSD is on the list of 'need to do' for my Msport 128i.

I actually really like the 6spd AT in this car, its not even half as bad as ive been led to believe.

Why no actual LSD is even offered for a BMW 'Msport' optioned car is baffling.

jcoop269 · 02-29-2016, 07:23 PM

Quote:

Originally Posted by Maximo44

A real LSD is on the list of 'need to do' for my Msport 128i.

I actually really like the 6spd AT in this car, its not even half as bad as ive been led to believe.

Why no actual LSD is even offered for a BMW 'Msport' optioned car is baffling.

Does this lack of LSD mean no rear diff.?

Fade135is · 02-29-2016, 08:41 PM

Quote:

Originally Posted by jcoop269

Does this lack of LSD mean no rear diff.?

Ummm?

dailowill · 03-01-2016, 01:50 PM

Quote:

Originally Posted by jcoop269

Does this lack of LSD mean no rear diff.?

No, it means that the default setup is a open differential + a crappy electronic "lsd".

skidawgz · 03-02-2016, 08:34 PM

It seems that MFactory makes an LSD for automatic 128i but I haven't reached out to them. I was considering the upgrade but decided I won't modify this car so heavily.

MFactory · 03-04-2016, 02:40 AM

The 128i AT uses the same diff as the 135i/335i AT. It's just the final gear ratio that is different (which is determined by the ring & pinion, which is separate from the LSD)

skidawgz · 03-04-2016, 08:05 PM

Quote:

Originally Posted by MFactory

The 128i AT uses the same diff as the 135i/335i AT. It's just the final gear ratio that is different (which is determined by the ring & pinion, which is separate from the LSD)

So to order for my car I would just purchase a Helical LSD with gears matching stock?

MFactory · 03-05-2016, 12:29 AM

You just need to order the LSD

The gears are a completely separate thing from the LSD

12-22-2015, 06:53 AM	#1
Swimjim Private First Class 24 Rep 177 Posts Drives: 2008 128i Join Date: Apr 2012 Location: TX iTrader: (1)	LSD for AT cars? question... is there an LSD for AT 128's? if not, why not?
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12-23-2015, 04:10 AM	#3
Swimjim Private First Class 24 Rep 177 Posts Drives: 2008 128i Join Date: Apr 2012 Location: TX iTrader: (1)	thanks. i asked because i have seen LSD's for manuals and wondered why there would be a difference.
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12-23-2015, 09:06 AM	#4
RoundelM3 Major General 1835 Rep 6,990 Posts Drives: 15 F80 M3, 22 G01 X3 30i Join Date: Apr 2010 Location: Clayton, NC iTrader: (2) Garage List 2022 BMW X3 [9.83] 2015 BMW M3 [6.50]	Only difference I could see would be the final drive ratio - usually is a bit higher numerically for automatics than for manuals. I would think any supplier of LSDs could set you up with any ratio you want. __________________ 2015 F80 ///M3 Sedan 7DCT Tanzanite, 2022 X3 sDrive30i 8AT Brooklyn Grey
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12-24-2015, 07:46 PM	#5
Maximo44 New Member 3 Rep 5 Posts Drives: 13' 128i Msport 'hardtop' Join Date: Dec 2015 Location: SF bay area,CA iTrader: (0)	A real LSD is on the list of 'need to do' for my Msport 128i. I actually really like the 6spd AT in this car, its not even half as bad as ive been led to believe. Why no actual LSD is even offered for a BMW 'Msport' optioned car is baffling.
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03-02-2016, 08:34 PM	#9
skidawgz Private 14 Rep 64 Posts Drives: '13 e92 M3, '09 128i, '95 318i Join Date: Jun 2015 Location: Philly Philly iTrader: (0)	It seems that MFactory makes an LSD for automatic 128i but I haven't reached out to them. I was considering the upgrade but decided I won't modify this car so heavily. __________________ 2013 BMW e92 M3 6MT "stripper" 2009 BMW e82 128i AT Sport Options (stock) 2004 Mustang v6 4.2L w/ Easton M112 S/C 1995 BMW e36 318i (stock)
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03-04-2016, 02:40 AM	#10
MFactory Major 581 Rep 1,421 Posts Drives: E92 M3 Join Date: Feb 2014 Location: San Dimas, CA iTrader: (2)	The 128i AT uses the same diff as the 135i/335i AT. It's just the final gear ratio that is different (which is determined by the ring & pinion, which is separate from the LSD)
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03-05-2016, 12:29 AM	#12
MFactory Major 581 Rep 1,421 Posts Drives: E92 M3 Join Date: Feb 2014 Location: San Dimas, CA iTrader: (2)	You just need to order the LSD The gears are a completely separate thing from the LSD
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