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Old 25th September 2017, 02:42 PM   #1
gcpm3
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Default Diff Rebuild - why is it so hard to find a decent company to do this!

Hello Everyone

so I need to get my diff rebuilt, and maybe upgraded

I have been looking on here to find a few reviews / options and can not find a conclusive answer on who to use! Some people say X company is great, others say they were terrible! Others say use this company, you ring them up and then they say they don't do M3 diffs and cant get the parts anymore!

so... to finally get some names Can people who have had their diff rebuilt and had good experience list the supplier below, and also if its bad!

thanks!
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Old 28th September 2017, 01:58 PM   #2
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anyone?
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Old 28th September 2017, 02:11 PM   #3
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Mrd1984 on here did mine.
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Old 28th September 2017, 02:21 PM   #4
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Why a rebuild? mine whines slightly..... change the fluid and see what happens LOL ive gotten used tot he noise now (which is amplified as have zero sound deadening or interior!
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Old 28th September 2017, 02:36 PM   #5
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The problem with the E46 M3 diff is that spares for the actual LSD unit itself don't appear to be available.

If your LSD is healthy however, the diff can be rebuilt by anyone competent that has the correct tools. I've just rebuilt one myself with a 3.91 ring and pinion set.
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Old 28th September 2017, 03:01 PM   #6
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Quote:
Originally Posted by cossie1 View Post
Mrd1984 on here did mine.
Can vouch for Mrd1984 (Darragh), did my valve shims. Top guy.
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Old 13th February 2018, 04:38 PM   #7
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Quote:
Originally Posted by SNS View Post
Can vouch for Mrd1984 (Darragh), did my valve shims. Top guy.
I have known and used Darragh for a number of years, top guy and will go to great lengths to help anyone.
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Old 13th February 2018, 07:35 PM   #8
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I made a 400 mile round trip down to Darragh last october.He changed it over for a rebuilt one while i waited,about 3 hrs,drove home and its been spot on since,top bloke.

Steve
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Old 13th February 2018, 07:48 PM   #9
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PM Martin @MS Motorsport on here
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Old 14th February 2018, 01:12 AM   #10
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Quote:
Originally Posted by Fixedgear View Post
I have known and used Darragh for a number of years, top guy and will go to great lengths to help anyone.
Whereabouts is Darragh based ?
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Old 14th February 2018, 03:30 AM   #11
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Geoff Steel Racing. They take care of everything on my car. No need to go anywhere else.
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Old 14th February 2018, 07:44 AM   #12
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Left Mrd1984 a PM based on your feedback.
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Old 14th February 2018, 07:45 AM   #13
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Quote:
Originally Posted by AC427 View Post
Whereabouts is Darragh based ?
His details on here say Oxford.
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Old 14th February 2018, 09:54 AM   #14
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Mr D is the man, yep based in Oxford and worth the travel if you want something done by an F1 engineer.
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Old 14th February 2018, 10:03 AM   #15
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+1 for Darragh! His FB page : everything///m3’s
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Old 14th February 2018, 10:25 AM   #16
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Munich Legends built my diff when I had the 4.1 fitted

Good but expensive !

Worth ringing them for a quote 01825 740456
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Old 14th February 2018, 01:47 PM   #17
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+1 for MrD. Treats your car as his own. F1 bolter his attention to detail is high as expected.

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Old 14th February 2018, 02:25 PM   #18
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Darragh is The man, I will be doing a full video of what he does next month.
After years of people searching for a solution to the dreaded diff rebuild, we finally have a trust worthy vendor.

Yes he will be doing my own M3's diff.... as soon as Ralph finishes painting it!
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Old 14th February 2018, 03:31 PM   #19
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Quote:
Originally Posted by AC427 View Post
Whereabouts is Darragh based ?
Banbury
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Old 14th February 2018, 07:04 PM   #20
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I think overhauling the M3 diff is far over exaggerated. It's really not difficult.

When it comes to diff rebuilding and your using for example ramp style lsd with custom plates and machining the housing for custom lockup then yes, that's tricky.

But our diff is not customisable, the clutches are not replaceable.

With a bit of common sense and the correct tools ( not expensive) and the will to learn it's very doable.

I made a DIY on m3forum!
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