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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 Mon, Aug-06-2018, 07:52:11 PM   #1
e36 323ti
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Default E46 M3 Diff (my journey)...

My e46 m3 diff journey: As most E46 M3 owners, my cars does have some sort of e46 M3 diff clunk. Not sure if mine is the "normal" clunk, since it is extensive and quite loud. A "lot" of play in both output flanges as well as in the input flange. The diff has 155.000 km.

To make a long story short, I ordered a complete factory new unit. About to install it, but before I do I took the time to document the new unit (the old one will be documented after the new one is in place).

What is noticed is that there is approx 1.5mm rotational play in the left side flange, virtually no rotational play in the right (passenger) flange and absolutely no play in the input flange.

Took a video of the new diff unit:


To be continued ....
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Old Mon, Aug-06-2018, 07:55:11 PM   #2
oceansize
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Default Re: E46 M3 Diff (my journey)...

I'm in...
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Old Mon, Aug-06-2018, 09:07:52 PM   #3
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Default Re: E46 M3 Diff (my journey)...

Interested to see what play looks like after break in


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Old Tue, Aug-07-2018, 03:20:10 AM   #4
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Default Re: E46 M3 Diff (my journey)...

+1
Quote:
Originally Posted by fattycharged View Post
Interested to see what play looks like after break in


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'85 528e 164k miles (sold)
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All DIY: 330 ZHP steering rack, diffsonline 4.1 diff with rem polish, E60 short shifter lever, AKG black diff bushings/subframe bushings, Rogue rtab, WPC rod bearings, Beyer driveshaft, full SS (SS stepped V1, catted S1, resonated S2, SS sport), Sachs clutch/flywheel, rear main, VANOS bullet proofing with anti-rattle, valve adjustment, cooling refresh, Ohlins R&T/Swift 448f 672r/GC street tops and camber plates, AFD E85 Proflex kit.
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Old Tue, Aug-07-2018, 12:08:25 PM   #5
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Default Re: E46 M3 Diff (my journey)...

subed, to see if there's clunk issue after the factory unit is installed.
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Old Tue, Aug-07-2018, 03:37:54 PM   #6
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Default Re: E46 M3 Diff (my journey)...

Very interested to find whether your new diff clunks or not.
"Normal and necessary for proper M-Variable Locking Concept operation."
...Not a true statement!
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Old Tue, Aug-07-2018, 03:50:02 PM   #7
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Default Re: E46 M3 Diff (my journey)...

Quote:
Originally Posted by nowanker View Post
Very interested to find whether your new diff clunks or not.
"Normal and necessary for proper M-Variable Locking Concept operation."
...Not a true statement!
I purchased two e46 M3s brand new.

Both had M clunk from day 1, with <5 miles on the odometer.
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Old Tue, Aug-07-2018, 03:50:44 PM   #8
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Default Re: E46 M3 Diff (my journey)...

Please stop vertical video.
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Old Tue, Aug-07-2018, 05:14:00 PM   #9
mrgizmo04
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Default Re: E46 M3 Diff (my journey)...

I got a 4.1 fully rebuilt unit from diffsonline, had clunk.

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All DIY: 330 ZHP steering rack, diffsonline 4.1 diff with rem polish, E60 short shifter lever, AKG black diff bushings/subframe bushings, Rogue rtab, WPC rod bearings, Beyer driveshaft, full SS (SS stepped V1, catted S1, resonated S2, SS sport), Sachs clutch/flywheel, rear main, VANOS bullet proofing with anti-rattle, valve adjustment, cooling refresh, Ohlins R&T/Swift 448f 672r/GC street tops and camber plates, AFD E85 Proflex kit.
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Old Tue, Aug-07-2018, 05:32:33 PM   #10
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Default Re: E46 M3 Diff (my journey)...

My diffsonline has clunk. I asked them to make it as tight as possible so clunk is way less than it was before. However there is a price for tighter assembly it whines more than stock when you of throttle at 60-80mph.
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Discussing Build Journal - RTD shifter - SMG to 6sp conversion 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)