Grinding/vibration when accelerating
Thread Starter
Junior Member
Joined: Oct 2012
Posts: 51
Likes: 0
07 Ducati S4R & 04 e55
Grinding/vibration when accelerating
Hi All
Car developed a strange issue recently. If i accelerate slowly it feels normal, but if i give it a bit more i can actually feel a grinding feeling through the floorboard!
I replaced the motor and trans mounts about 5 months ago, and the carrier bearing about a month ago.
Could it be a failing u-joint? Any ideas welcome!
Car developed a strange issue recently. If i accelerate slowly it feels normal, but if i give it a bit more i can actually feel a grinding feeling through the floorboard!
I replaced the motor and trans mounts about 5 months ago, and the carrier bearing about a month ago.
Could it be a failing u-joint? Any ideas welcome!
MBWorld Fanatic!
Joined: Jan 2009
Posts: 3,182
Likes: 15
From: Northern VA
W211
i have this as well when i stomp on the gas...Thought it was the headers rubbing but not, bad wheel bearing, not. replaced by leaking power steering pump last week and seemed to go away.
Super Member
Joined: Dec 2007
Posts: 504
Likes: 8
From: DE
2003 E55 AMG
Hi All
Car developed a strange issue recently. If i accelerate slowly it feels normal, but if i give it a bit more i can actually feel a grinding feeling through the floorboard!
I replaced the motor and trans mounts about 5 months ago, and the carrier bearing about a month ago.
Could it be a failing u-joint? Any ideas welcome!
Car developed a strange issue recently. If i accelerate slowly it feels normal, but if i give it a bit more i can actually feel a grinding feeling through the floorboard!
I replaced the motor and trans mounts about 5 months ago, and the carrier bearing about a month ago.
Could it be a failing u-joint? Any ideas welcome!
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Thread Starter
Junior Member
Joined: Oct 2012
Posts: 51
Likes: 0
07 Ducati S4R & 04 e55
I'm thinking there is a small possibility that one of the nuts came off of the top of the motor mount, and now the motor is pitching over when under load.
I torqued those things as best i could but damn was it hard to get good leverage up there!
I torqued those things as best i could but damn was it hard to get good leverage up there!
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Newbie
Joined: Aug 2014
Posts: 2
Likes: 0
cls 55 amg
solution
Hello,
Has any one found the culprit for this issue?
I just picked up the cls55 2 nights ago. The test drive was perfect and I was very conservative during the test drive after I signed all the papers and left I smashed on the gas and got the same vibrations under the floor board described. Anyone know what this is?
Any help would be appreciated!
Has any one found the culprit for this issue?
I just picked up the cls55 2 nights ago. The test drive was perfect and I was very conservative during the test drive after I signed all the papers and left I smashed on the gas and got the same vibrations under the floor board described. Anyone know what this is?
Any help would be appreciated!
Super Member
Joined: Apr 2012
Posts: 887
Likes: 2
From: Northern California
2004 E55 AMG; 1991 Previa
Hello,
Has any one found the culprit for this issue?
I just picked up the cls55 2 nights ago. The test drive was perfect and I was very conservative during the test drive after I signed all the papers and left I smashed on the gas and got the same vibrations under the floor board described. Anyone know what this is?
Any help would be appreciated!
Has any one found the culprit for this issue?
I just picked up the cls55 2 nights ago. The test drive was perfect and I was very conservative during the test drive after I signed all the papers and left I smashed on the gas and got the same vibrations under the floor board described. Anyone know what this is?
Any help would be appreciated!
Newbie
Joined: Aug 2014
Posts: 2
Likes: 0
cls 55 amg
Will definitely have your recommendations looked into
MBWorld Fanatic!
Joined: Jan 2010
Posts: 1,057
Likes: 19
From: SWFL
E55, E320 CDI , CLA250, Jag XJ Supersport
Check the motor mount bolts both sides, top & bottom. I had this problem when the dealer forgot to reinstall them after working on my car.
These bolts seem fairly week also. I snapped one by hand during an install not too long ago. So, maybe it broke.
The lower bolt part number is 2209902201
These bolts seem fairly week also. I snapped one by hand during an install not too long ago. So, maybe it broke.
The lower bolt part number is 2209902201
Super Member
Joined: Apr 2012
Posts: 887
Likes: 2
From: Northern California
2004 E55 AMG; 1991 Previa
Check the motor mount bolts both sides, top & bottom. I had this problem when the dealer forgot to reinstall them after working on my car.
These bolts seem fairly week also. I snapped one by hand during an install not too long ago. So, maybe it broke.
The lower bolt part number is 2209902201
These bolts seem fairly week also. I snapped one by hand during an install not too long ago. So, maybe it broke.
The lower bolt part number is 2209902201
Last edited by biggking; Aug 19, 2014 at 03:23 PM.
MBWorld Fanatic!
Joined: Jan 2010
Posts: 1,057
Likes: 19
From: SWFL
E55, E320 CDI , CLA250, Jag XJ Supersport
Motor mounts are way different when they are bad. I had issues where the entire car lurched at a stop or take off. I also had some vibrations due to a bad transmission mount (20 min to replace on a lift) and also I changed my end rubber pieces for the drive line (they were cracked). I honestly think it was the transmission mount, I have actually replaced one earlier today and the car had major vibrations and it sounded like a diesel on take off. After we replaced the mount ($60 from MBZ i think) the noise and vibration went away. Upon initial inspection of the car we could not tell that the rear transmission mount was bad. Once we removed it, the play was insane.
It took me a while to figure it out, but it's a easily identified visually.
