Rear end noise ? - Mercedes-Benz Forum

 
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post #1 of 4 (permalink) Old 12-28-2003, 10:41 AM Thread Starter
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Rear end noise ?

Happy Holidays listers all and a good New Year to you all

I have owned my "Collector" 450 SLC since September and since that first week have been troubled by a kind of rythmical but not heavy kind of repetitive noise coming from the rear end. At first it seemed to be coming from the right hand side but after having a friend sit in the back seat he assures me it's coming from somewhere around the centre. We don't think it's the diff because the noise is intermittent and not "heavy" it can be quite loud and tinny especially with the windows open. Sometimes it's not there at all and when it does come it's usually after the car is well warmed up. The innner right wheel bearing does show some signs of leakage but has been checked by a mechanic and he says it runs as smooth as silk. He has also checked to make sure the backplate behind the roror is tight and we still have the problem. I do have a minor sweat at the right output side of the diff but my fluid level remains okay. Is it possible that the joints inside the rubber boots just outside the diff need to be relubed or could something else we've not covered be the source of this intermittent noise. I'm tearing my hair out over this one because everyone is telling me nothing is going to seize up and I shouldn't be too concerned about taking the car for the occasional drive. Even my best friend who is a respected mechanic of over 40 yrs. experience. Has anyone had a similar experience. All assistance greatly appreciated.

Gordon Foster (Vancouver, Canada)

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post #2 of 4 (permalink) Old 12-28-2003, 05:40 PM
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RE: Rear end noise ?

Gordon:
Have you actually changed your rear end fluid and flex disc yet?[8)]
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post #3 of 4 (permalink) Old 12-28-2003, 08:50 PM Thread Starter
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RE: Rear end noise ?

I have not, and would like to know more about this procedure - can you elaborate and give approx. cost .
I do have the complete cd-rom manuals so I'll be checking there too. Thanks for any more info you can provide.

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post #4 of 4 (permalink) Old 01-31-2004, 09:25 PM
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RE: Rear end noise ?

I don't know what the rear suspension in your car looks like, but few mechanics and I went round and round trying to find a serious hum coming out of the differnetial of my 240D. I replaced the differential and a wheel bearing, but the problem remained. Then I noticed a bit of powdery rust comming off the two rubber bushings that connect the lower trailing arms to the body. Turned out there was nothing wrong with the differential or wheel bearings, just the squished bushing had metal to metal contact (that's where the rust powder was coming from) and it transmited and amplified the normal operating noises. Good luck, Stan
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