03-25-2020, 08:35 PM | #1 |
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135i optional LSD (limited slip diff)
Without driving it, is there an easy way to tell if a 135i has the optional LSD?
thanks Last edited by latebraker; 03-26-2020 at 08:22 PM.. |
03-29-2020, 07:03 PM | #5 | |
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The e82 135i never had a LSD option from the factory. For the f20 M135i and M140i's BMW Performance offered a Drexler made LSD. It was quite expensive at around $2K. Only pure M cars like the M2/M3/M4, etc... have real mechanical LSD. For our e82's we make due with an e-LSD... which the DSC module uses the ABS system to stop one of the rear wheels from spinning. It's not a real LSD. Dackel
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03-31-2020, 09:55 PM | #6 | |
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The M differential is a FULL-LOCK differential...it can completely lock both wheels whereas a Limited Slip will only transfer on average 15-20%. I just wanted to clarify it for others. Cheers! |
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04-01-2020, 10:27 PM | #7 | |
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the 1M has the same differential as the E9X M3 which in turn has pretty much the same differential as the E46 M3. and it's always been known as a Variable Lock M Differential. It means as you said a full transfer of power to the wheel with fraction, instead of partial transfer; but this can be totally variable, hence the name. More options and more flexibility.
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04-02-2020, 02:09 AM | #8 | ||
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That is the point, that is not a limited slip though everyone commonly calls it an LSD/ I also called it that until I was corrected in Germany. I also did not say it was called a FULL-LOCK diff, I said, based on what the M gentleman told me, a FULL-LOCK diff. For example, BMW calls their turbo engines TWIN-POWER turbo. I so if I say the TWIN-POWER turbo is a SINGLE TWIN SCROLL turbo, that is not that I am saying it is called a TWIN SCROLL turbo by BMW. What I am saying is what it IS a twin scroll single turbo engine not what BMW calls it. The point again, is that this was based on what the gentleman at M told me during my visit and it is not limited to a percentage but can achieve full lock. Here is BMW documentation on the 1M diff as well as description of the M235i LIMITED SLIP differential called M Performance Differential so people can see for themselves. : https://www.1addicts.com/forums/atta...4&d=1329761227 page 8: Last edited by nachob; 04-02-2020 at 03:36 AM.. |
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04-02-2020, 08:04 AM | #9 |
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Not the same but I believe the M differential is similar to what I have installed in my rear pumpkin (customized clutch drexler). The ramps are adjustable from 10% to full lock. Typically they are something like 40/10 or 50/25. Full lock on accel or high lock on decel are highly undesirable.
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04-02-2020, 01:46 PM | #10 | |
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If I was going to put an lsd in a 135i I would probably talk to an outfit like Turner Motorsports or Dackelone since he is connected. : ) |
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04-02-2020, 02:28 PM | #11 | |
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Agreed on the M diff. At least the M rear end has strong axles. Would have saved me replacing mine.
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04-03-2020, 11:46 AM | #12 | ||
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