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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Tue, Sep-25-2018, 05:09:46 PM   #41
sooch
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Default Re: Digging into the Diff Rebuild

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Originally Posted by WALKD_U View Post
You in NJ? My builder Billiam Mason did my install. My car is still up there as well

https://www.instagram.com/p/Bk6YQswg...on_share_sheet
Do you have labor rates for a rebuild like this? It seems like there is no straight answer for a stock LSD rebuild with bearings... If PM is more comfortable feel free.

I have worsening groan & some standard clunk (is that the lsd unit or the bearings). OEM fluid is in place with friction modifier...
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Old Tue, Sep-25-2018, 05:19:32 PM   #42
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Default Re: Digging into the Diff Rebuild

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Originally Posted by sooch View Post
Do you have labor rates for a rebuild like this? It seems like there is no straight answer for a stock LSD rebuild with bearings... If PM is more comfortable feel free.

I have worsening groan & some standard clunk (is that the lsd unit or the bearings). OEM fluid is in place with friction modifier...
Rates are different depending what is needed. I did 3.15 REM Polish R&P, RaceDiff LSD Clutch Pack with Shim for Passenger side wiggle flaw, with new bearings and seals.

I would PM him to see how much depending on what you need.
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Old Wed, Sep-26-2018, 12:52:36 AM   #43
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Default Re: Digging into the Diff Rebuild

Funny because as I was doing some research on Racing Diffs online, I came across a post on IG with which seems to be your diff and Bill's IG..... I reached out to him and we haven't been able to connect yet but I hoping to soon.

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Originally Posted by WALKD_U View Post
You in NJ? My builder Billiam Mason did my install. My car is still up there as well

https://www.instagram.com/p/Bk6YQswg...on_share_sheet
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Old Wed, Sep-26-2018, 12:55:01 AM   #44
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Default Re: Digging into the Diff Rebuild

Good to hear!! I'm going to be ordering the clutch pack from them as well so hopefully it goes as well.

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Went well! I just broke everything in this past weekend. My diff shop said everything went smoothly with the replacement rings/steels. Replaced my bearings with new timken bearings, and threw in the 4.10's.

The 4.10's make 6th gear pretty useful - but on the flip side, mpg has definitely dropped, haha.
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Old Fri, Nov-02-2018, 04:08:19 PM   #45
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Default Digging into the Diff Rebuild

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http://performancegearing.com/



Jim Blanton. Do a bit of digging and youíll find he is highly respected. Did an excellent job on my diff, converted it to a true limited slip setup and now the rear end is dead silent, smooth and utterly predictable. The whole Ďsharp edgeí of the rear end snapping out is long gone. Other rebuilders send their diffs to him. Give him a shout, he is filled with knowledge and can write pages and pages about any topic you might have questions on.

The problem with the M lock is it locks and unlocks too slow...itís always behind. Which is why youíll frequently end up in a tank slapper which is easily fixed by easing off the throttle.

The clutch type (ZF from an early model BMW LSD up to e39 M5) diff locks as soon as thereís slip. Metric Mechanics, Jim Blanton and Diffsonline all play with preload, ramp angles and static lock...but itís pretty much the same diff.

You used to be able to pull a 210mm ZF unit from an E32 750iL, pre-E60 M5, 535i, e24 M6 and M635CSi.

If youíre lucky, you get a diff from an E34 M5 or E24 M6 that has a 3.91 gearset AND the ZF 2 clutch diff.


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Old Thu, Jan-10-2019, 02:37:00 AM   #46
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Default Re: Digging into the Diff Rebuild

What shop in San Diego did you take it to and how much do they charge? My diff is starting to make clunking and howling noises, diff bushings already replaced so Iím pretty sure the diff is the culprit.
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Old Thu, Jan-10-2019, 02:22:35 PM   #47
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Default Re: Digging into the Diff Rebuild

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Originally Posted by bigjae1976 View Post
The problem with the M lock is it locks and unlocks too slow...itís always behind. Which is why youíll frequently end up in a tank slapper which is easily fixed by easing off the throttle.

The clutch type (ZF from an early model BMW LSD up to e39 M5) diff locks as soon as thereís slip. Metric Mechanics, Jim Blanton and Diffsonline all play with preload, ramp angles and static lock...but itís pretty much the same diff.

You used to be able to pull a 210mm ZF unit from an E32 750iL, pre-E60 M5, 535i, e24 M6 and M635CSi.

If youíre lucky, you get a diff from an E34 M5 or E24 M6 that has a 3.91 gearset AND the ZF 2 clutch diff.


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What all is required to retrofit an E34 M5 diff to our cars? Swap out back cover and output flanges?
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Old Thu, Jan-10-2019, 03:19:01 PM   #48
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Default Re: Digging into the Diff Rebuild

The internals are the same, but the case itself is different.
Also on the M3, one of the output flanges is too short to use with the earlier LSD.
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Old Fri, Jan-11-2019, 04:11:00 AM   #49
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Default Re: Digging into the Diff Rebuild

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The internals are the same, but the case itself is different.
Also on the M3, one of the output flanges is too short to use with the earlier LSD.

Both output flanges are the wrong length. Youíll need to cut the longer one.

You can pull the flanges from another 210mm ZF LSD diff.

I would bet that you can use the flanges from an open 210mm diff. If thatís the case then it would be cheaper to get an open LSD and use the flanges vs other options.


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Old Fri, Jan-11-2019, 04:12:47 AM   #50
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Default Re: Digging into the Diff Rebuild

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What all is required to retrofit an E34 M5 diff to our cars? Swap out back cover and output flanges?

You need the LSD unit and output flanges. If youíre using a Motorsport R&P or reusing the 3.62, youíll need to drill the bolt holes in the LSD unit to 14mm.

Older ZF LSDs used a 12mm bolt to secure the ring gear to the LSD unit.


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Discussing Digging into the Diff Rebuild in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)