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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 Sun, Oct-17-2010, 03:48:50 PM   #21
enigmaticdream
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Unless I'm interpretting the incorrect seal, you should be using RTV sealant and not the gasket.

http://www.turnermotorsport.com/html...ID=33121214719

I was just so happenning to be on turner's site yesterday looking at diffs and read the info on the link above.

I hope that helps!
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Old Sun, Oct-17-2010, 05:04:59 PM   #22
Mr. Wolfe
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I think I am looking at replacing #11 in the following picture. The diff itself isn't leaking, but where the axle bolts into the diff.
http://realoem.com/bmw/showparts.do?...65&hg=33&fg=05

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Old Sun, Oct-17-2010, 05:33:43 PM   #23
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How are your mounting bolts? I was reading on the fanatics that the mounting bolts could potentially back out causing some serious damage. I know you swapped diffs with someone that had 4.10's, did you use anything on the mounting bolts to prevent them from backing out?
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Old Sun, Oct-17-2010, 07:32:30 PM   #24
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Quote:
Originally Posted by MY02M3DINAN View Post
The rear diff cover correct?
Yep, towards the top.

Tom
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Old Sun, Oct-17-2010, 09:01:47 PM   #25
00 XE7EN
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i have the same slow leak issue already mentioned. didnt catch it until recently. who knows how long it's been like that, but no problems so far.
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Old Mon, Oct-18-2010, 01:03:22 AM   #26
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Quote:
Originally Posted by Mr. Wolfe View Post
I think I am looking at replacing #11 in the following picture. The diff itself isn't leaking, but where the axle bolts into the diff.
http://realoem.com/bmw/showparts.do?...65&hg=33&fg=05

Mr. Wolfe

I'm talking about replacing #7.

The #11 seals are a piece of cake to replace.... about 20 minutes each.
Seepage is normal for these, dripping is not.
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Old Mon, Oct-18-2010, 01:22:40 AM   #27
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Quote:
Originally Posted by Adgar View Post
How are your mounting bolts? I was reading on the fanatics that the mounting bolts could potentially back out causing some serious damage. I know you swapped diffs with someone that had 4.10's, did you use anything on the mounting bolts to prevent them from backing out?

When I put mine back in I just torqued them to factory specs, 128ft-lb for the front and 48 ft-lb for the rear bolts, and check them again in about 500 miles. If they loosen up then I will look at blue locktite or something.

Tom
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Old Mon, Oct-18-2010, 01:25:43 AM   #28
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Quote:
Originally Posted by MY02M3DINAN View Post
I'm talking about replacing #7.

The #11 seals are a piece of cake to replace.... about 20 minutes each.
Seepage is normal for these, dripping is not.

I think you just pry out the flanges to do #11, but had to unbolt the diff and wiggle it around to get the axles in. Has anyone been able to put the shafts in without moving the diff and just disconnecting the lower control arms?

Thanks.

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Old Mon, Oct-18-2010, 03:24:43 PM   #29
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Quote:
Originally Posted by MY02M3DINAN View Post
I'm talking about replacing #7.

The #11 seals are a piece of cake to replace.... about 20 minutes each.
Seepage is normal for these, dripping is not.
I have not looked at the car since Friday. I will dig into this sometime this week. I guess I just figured it was the axle being that all of the spray was on one side of the car. I guess the drive shaft spinning in 1 direction could also cause that.

I will keep this post updated.

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Old Wed, Nov-17-2010, 12:28:42 AM   #30
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Why is seepage "normal"? I just had my seals replaced under cpo (car only has 20,000 miles). Is this another item that needs to be periodically inspected on these cars? The purpose of a seal is to prevent fluid from leaking... are there any after market seals that perform better than OEM?
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Discussing Differential Seal Leak (with pictures) 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)