Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 10-23-2003, 01:25 PM
Zoonhollis's Avatar
Diesel Fanatic
 
Join Date: Jun 2000
Location: Cary, NC
Posts: 551
Harmonic Drivetrain Noise

Okay, I've used the search tool and found some good info, but nothing that describes my problem exactly.

I think I've eliminated the wheels/tires as culprits for this strange highway noise I'm getting at speed. The car is an '84 300D with 230K miles. I'm pretty sure it's something in the driveline--perhaps a driveshaft out of balance. The sound is like:


wwwWWWOOOWWWwww...wwwWWWOOOWWWwww (ad nauseum)

...in other words, it's not constant, but fluctuates harmonically. Could it be worn flex discs? A fatigued tranny mount (deviating the angle of the shaft)? Out-of-balance driveshaft?

I've managed to get this car fairly quiet at highway speeds, and now this noise is particularly apparent.
__________________
Matt
------
1995 E300 Diesel (Die Blau Frau)
Reply With Quote
  #2  
Old 10-25-2003, 10:37 AM
Registered User
 
Join Date: Dec 2002
Location: Grand Rapids, MI
Posts: 766
If it's a variable-pitch sound as your speed is steady, check a thread on this site under "the howling"; I get a similar noise under cool temp conditions before full warmup on my 560SL, and I'm sure it comes from the viscous fan drive. In my case, the viscous drive appears to go into locked-up mode at too low a temperature; since it cools the engine just fine, I'm putting off replacement till next spring after the storage season.
__________________
Craig Bethune

'97 SL500, 40th anniversary edition

'04 Olds Bravada (SWMBO's)
'06 Lexus ES330
'89 560SL (sold)


SL--Anything else is just a Mercedes.
(Kudos to whoever said it first)
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 08:13 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page