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Old 08-29-2001, 02:38 PM
crhenkel's Avatar
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Join Date: Mar 2001
Location: Decatur, Illinois, USA
Posts: 616
1990 190E rear diff going bad

I got a 1990 190E 2.6 stock setup w/ a growl inthe rear diff that is getting worse. SHop I use found a new one in Jersey they will install for $1900. I found a used one for $350 I have to install. Anyone know what diff from what years I can use to replace my bad one? I was told a 1990 190E 2.6 could use a 1991 rear diff, but a 1992 will not work. Will older ones work? I really would like to get the posi rear diff from something to install. Please help. The swap is a fairly simple one as far as the work goes, I just need to know which ones will mate up correctly. Posi rear diff option was out there, I would like that ...

Oh hey, Is there any truth to the comments I have hear several shops tell me that the rear diffs are not worth "rebuilding", replace them or do nothing till they go out is what I am told.

Christopher Henkel
1990 190E 2.6 - Arctic white SOLD
1986 190E-16v - Blauswartze
1993 300CE - SOLD
2003 W208 CLK 320 Cabriolet - Magma Red
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Old 08-29-2001, 05:20 PM
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Are you sure that the diff is at fault?I had a noise which one shop tested by putting the car up off the ground and then running it at 60-70mph and listening to the diff unit with a stethascope ,they confirmed it was a diff bearing but the quote made me seek a second opinion!!This guy took it up the road ,wiggled about a bit and said the rear passenger side wheel bearing was weak!There was no play in it but I changed it anyway and the problem was solved for $40,so please be a 100% certain as diffs very really go!!
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Old 08-29-2001, 05:27 PM
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Join Date: Oct 1999
Location: New York City Burbs
Posts: 177
Thumbs up Get a factory rebuild!

I have been down this road before.

The dealer priced a factory rebuilt one at $1200. In retrospect, I should have jumped on it.

You're right in that it's a straight forward job to put in, but I was in there 4 or 5 times with bad used ones or improperly set ones over the period of a few years. That gets tedious.

Search my prior posts on this one.
Patrick Leber
'84 190E 2.3
'83 Porsche 944 (track car)
'84 Porsche 944 (parts car)
85.5 Porsche 944 (sled)
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Old 08-29-2001, 06:57 PM
Mike Murrell's Avatar
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Join Date: Feb 2000
Posts: 2,580
Take Christopher's advise get ANOTHER(maybe two) opinions B4 you drop money on this repair.

Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
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