Rear Centre Differential Mount - BMW M5 Forum and M6 Forums
E28 M5 Discussion 1984-1988

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post #1 of 39 Old 3rd October 2008, 04:54 PM Thread Starter
davidoli
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Rear Centre Differential Mount

The rear of the differential is mounted to the chassis of our cars by a M12 Hex bolt that goes into a rubber mount fixed to the underneath of the car by four M10 Hex bolts .

See RealOEM.COM * BMW E28 M5 FINAL DRIVE COVER/TRIGGER CONTACT

part no
13RUBBER MOUNTING133171130900


My E28 M5 has recently been producing a relatively solid clunk from the rear when releasing the clutch from a standstill that has been traced to the deterioration of this part .

I called my dealer to order this part and was shocked to be told it would cost £170 ......

Has anyone else experienced this part failing ?

D

Better a day as a tiger than a lifetime as a sheep !

91 Sebring 3.6 | E28 UK RHD M5 | E34 UK RHD 3.8 | E34 M5 Touring | E24 M635CSi UK RHD

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post #2 of 39 Old 3rd October 2008, 09:38 PM
batmobile
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I changed it on My M635csi after only 40K KM, and even on the 535i every 60K it has to be replaced...so i think on the M5 should be a common manteinace item, even with this absurd price

Old BMWs never die!!!
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post #3 of 39 Old 3rd October 2008, 09:47 PM Thread Starter
davidoli
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Thanks Batmobile ....... don't you think that it would be incredibly easy to have a new mount fabricated ?

Or perhaps use the part from an M535i part no 33171129786

see http://www.realoem.com/bmw/showparts...11&hg=33&fg=10


D

Better a day as a tiger than a lifetime as a sheep !

91 Sebring 3.6 | E28 UK RHD M5 | E34 UK RHD 3.8 | E34 M5 Touring | E24 M635CSi UK RHD

www.classicmdautos.co.uk

Last edited by davidoli; 3rd October 2008 at 09:57 PM. Reason: Mention M5 , price triples !
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post #4 of 39 Old 3rd October 2008, 10:02 PM
batmobile
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I think, as it is specially made for M6 and M5, that it has a special Thoughness, but it could be done with a lot less money.
i bought one on ebay.com last year new for around 100 USD, and it was new, not old stock, so take a look..

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post #5 of 39 Old 4th October 2008, 12:08 AM
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post #6 of 39 Old 4th October 2008, 09:17 AM Thread Starter
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Quote:
Originally Posted by raymondw View Post
David,

It has failed on my car too, but that was six years ago.
After how many miles Raymond ?

And how many miles has it covered in the last 6 years ?

I may order both the M5 and the M535i items for a back to back comparison .

D

Better a day as a tiger than a lifetime as a sheep !

91 Sebring 3.6 | E28 UK RHD M5 | E34 UK RHD 3.8 | E34 M5 Touring | E24 M635CSi UK RHD

www.classicmdautos.co.uk
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post #7 of 39 Old 4th October 2008, 03:33 PM
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Quote:
Originally Posted by davidoli View Post
After how many miles Raymond ?
152k km

Quote:
Originally Posted by davidoli View Post
And how many miles has it covered in the last 6 years ?
3k km

D[/QUOTE]

Raymond

==> MY90 E34 M5 3.6 <==
==> MY85 E28 M5 M88/3 <==

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post #8 of 39 Old 8th October 2008, 09:21 PM Thread Starter
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I have asked my dealer to order both the M5 part and the M535i part for a side by side comparison .

M5 part £170

M535i part £47

I would expect to see a marked difference in quality .

We'll see ......report to follow .

Better a day as a tiger than a lifetime as a sheep !

91 Sebring 3.6 | E28 UK RHD M5 | E34 UK RHD 3.8 | E34 M5 Touring | E24 M635CSi UK RHD

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post #9 of 39 Old 8th October 2008, 09:48 PM
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David

if you can use one from the M535i, I would very much doubt it will fail.

Not to grief anyone, but the difference in power between a good M535i and a reasonably good M5 are not that big IRL, not to mention stress on drivetrain. A friend of mine has a very sound , strong pulling M535i and I can assure you that it has 90% of the M5 speed in 90% the cases compared the average E28 M5, even though the power is off by some 70 hp.

The M88 engine delivers its good at high revs, so no extra stress there on the drivetrain. The M30 is much torqueyer, meaning the power comes with more of a wham into the diff.

Ofcourse, people can disagree.

When I'll install the new engine {classified} into our E28 drifter, we'll probably manufacture some sort of heavy-duty solution for that but if I have things my way, the entire rear subframe goes anyways

Last edited by Sebring NL; 8th October 2008 at 09:51 PM.
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post #10 of 39 Old 9th October 2008, 12:08 AM Thread Starter
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My thoughts exactly Wout .

I will check the 2 parts side by side and decide .

If the M535i mount fits , I very much doubt that I would go through 3 of them before the M5 part fails .

We'll see when the parts arrive on Friday .

BMW did offer an uprated item that apparently comes from a 7 series ( E32 I believe ) , is cheaper than the M5 item at approx £127 but is German order only at the moment .

D

Better a day as a tiger than a lifetime as a sheep !

91 Sebring 3.6 | E28 UK RHD M5 | E34 UK RHD 3.8 | E34 M5 Touring | E24 M635CSi UK RHD

www.classicmdautos.co.uk
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