C63, 2011, vibration, quaife LSD
Thread Starter
Junior Member
Joined: May 2011
Posts: 64
Likes: 0
From: Montreal
C43 AMG CAB & VIPER
C63, 2011, vibration, quaife LSD
Hi all,
I'd like to call upon you for advice.
Last summer i had a quaife LSD installed on my 2010 c63 sedan. It really helped the car !
However I soon after noticed a vibration that is troubling me. It only happens above about 75mph (110kph).
The vibration feels like rolling on the vibrators on the highway emergency lane but very subtle and muffled. I hear it from the back and feel it in the seats and steering...This is unchanged for about 6 months.
It is pretty constant and seems more pronounced during acceleration. It does not change relative to gear. Only speed. I know it's not my wheels/tires or allignement because they are freshly balanced and alligned and also had the same vibration with winter tires.
At this point, I don't know what it could be.
My theories are:
Driveshaft screws (loose or missing)
Unbalanced Diff (factory defect)
Bearings ?
Something got damaged during installation or improperly re installed.
Wrong oil ?
I'm reluctant to tell the MB dealer because I don't want to risk them messing up my warranty...
Ps never hit anything, ever.
Any ideas (hope its not the diff...)
I'd like to call upon you for advice.
Last summer i had a quaife LSD installed on my 2010 c63 sedan. It really helped the car !
However I soon after noticed a vibration that is troubling me. It only happens above about 75mph (110kph).
The vibration feels like rolling on the vibrators on the highway emergency lane but very subtle and muffled. I hear it from the back and feel it in the seats and steering...This is unchanged for about 6 months.
It is pretty constant and seems more pronounced during acceleration. It does not change relative to gear. Only speed. I know it's not my wheels/tires or allignement because they are freshly balanced and alligned and also had the same vibration with winter tires.
At this point, I don't know what it could be.
My theories are:
Driveshaft screws (loose or missing)
Unbalanced Diff (factory defect)
Bearings ?
Something got damaged during installation or improperly re installed.
Wrong oil ?
I'm reluctant to tell the MB dealer because I don't want to risk them messing up my warranty...
Ps never hit anything, ever.
Any ideas (hope its not the diff...)
Last edited by Wack; Apr 1, 2013 at 12:02 PM.
Thread Starter
Junior Member
Joined: May 2011
Posts: 64
Likes: 0
From: Montreal
C43 AMG CAB & VIPER
You are right but he says that what I describe is not what an lsd does if it has a problem. Maybe my bearings failed due to a combination of defect and lets call this (abuse)...
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MBWorld Fanatic!
Joined: Oct 2009
Posts: 2,286
Likes: 62
From: eNyCe
Steel Grey Metallic C63!!
Tell the installer that he's full of shyt! A tune increase hp, but does not increase max torque at all. Sounds like he didn't properly install the lsd. It might not be properly aligned to the correct specifications.
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Thread Starter
Junior Member
Joined: May 2011
Posts: 64
Likes: 0
From: Montreal
C43 AMG CAB & VIPER
I think he meant the lsd increases the stress on the driveshaft and bearings and bushings due to increased traction.
Anyhow i need to take the car to them ASAP to get a straight diagnosis...
Will post results
Anyhow i need to take the car to them ASAP to get a straight diagnosis...
Will post results
Thread Starter
Junior Member
Joined: May 2011
Posts: 64
Likes: 0
From: Montreal
C43 AMG CAB & VIPER
How do I detect a bent wheel if not by balancing it ? Or cant see anything visually?
I never hit any big holes but I'd like to investigate the wheel suggestion (seems valid).
I never hit any big holes but I'd like to investigate the wheel suggestion (seems valid).
MBWorld Fanatic!
Joined: Apr 2012
Posts: 1,097
Likes: 6
From: Austin, TX
507 SEDAN
Please, do yourself a favor and don't let the installer off the hook. You might have a good relationship, but if the issue started with or is in conjunction with the LSD install, don't let him divert the issue otherwise.
Since I do not know your car, history, or issue I'm not saying it couldn't be something else. Just please don't let him off with a diversion to some other aspect of the car. I'd insist on him going back in and double checking his work and LSD install.
I am also speaking from experience from a botched LSD install.
Since I do not know your car, history, or issue I'm not saying it couldn't be something else. Just please don't let him off with a diversion to some other aspect of the car. I'd insist on him going back in and double checking his work and LSD install.
I am also speaking from experience from a botched LSD install.
Super Member
Joined: Sep 2012
Posts: 533
Likes: 5
C63 Coupe
I had a similar issue and thought it was my diff or drivetrain. had my wheels rebalanced 3 times from different places and still had the same issue starting at about 70 mph and getting worse as speed went up. I found a place that had a Hunter Road Force Balancer and the problem went away the car is smooth as silk up to 170 + ! The road force balancer puts load on the wheel as it electronically measures it as if the weight of the car was on it and moving at highway speeds and tells the installer where to put weight by shooting a laser in the spots its dumby proof. They also can put the tires on differently that can also affect balance and fix alignment issues if the car pulls left or right just by the balance of the wheel and placement of the tire on the wheel. Its a bit more coin but well worth it give it a shot
