M Performance LSD maintenance

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sam75
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M Performance LSD maintenance

Post by sam75 » Tue Jan 08, 2019 8:25 pm

I have been searching the site and google but struggling to get a definitive answer.

I am looking to get an LSD for my m135i, and undecided between the Quaife or the M Perf Drexler unit. From what I understand, the Quaife is maintenance free (maybe oil change at some point), but the BMW Drexler unit has clutch plates that can wear.

Does anyone know what (if any) maintenance is needed and when on the BMW LSD (aside from diff oil changes)? Some people say they can be serviced, others say BMW would recommend you replace the unit if it wears, but both of these options sound expensive :)

Thanks in advance

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marco_polo
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Re: M Performance LSD maintenance

Post by marco_polo » Tue Jan 08, 2019 8:30 pm

I'd recommend an M22 magnetic Dimple drain plug, and oil changes with 75w140-LSD every 25,000 approx.

No need to take them apart under usual circumstances, I bet there are thousands of Drexler equipped M3's with starship miles on them, still going strong.

Worst case, send it to Drexler I suppose? Definitely no need to bin it.
Silver F21 M135i - ManBox - HK - Adaptive + Eibach Pro's - BBS CH-R's - BMWP Drexler LSD - M4 LCA's

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sam75
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Re: M Performance LSD maintenance

Post by sam75 » Tue Jan 08, 2019 8:35 pm

Yes that's a good point, you don't really hear about M cars suffering with worn diffs. Maybe I am over-thinking this :) Thanks

rix
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Re: M Performance LSD maintenance

Post by rix » Sun Jan 13, 2019 10:01 pm

An oil change every now and again can’t ever be a bad thing surely, I do find it odd how some boxes and LSDs are supposedly sealed for life!

Autosri
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Re: M Performance LSD maintenance

Post by Autosri » Sun Jan 13, 2019 11:41 pm

I kinda understand the sealed till death thing as there is limited foreign materials in a gearbox and open diff but with a clutch diff there are wearable items inside of it with the friction disks
I’m sure my Kaaz diff in my Nissan recommended every 10k or something but when I changed it the oil looked good just a bit sparkly
I’d be inclined to agree with Marco if not a little less maybe every oil change at 20k just to protect your investment

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