Humming noise when decelerating
04-10-2015, 06:37 PM
#1
Super Member
Thread Starter
Humming noise when off/on throttle
I can clearly hear the difference between just barely having my foot on gas (no noise) & when I take foot off a humming sound starts. Most noticeable about 50 to 70mph. It sounds like its coming from trans tunnel. Any thoughts?
Last edited by Hotsauce55; 04-22-2015 at 08:12 AM.
04-22-2015, 07:58 AM
#5
Super Member
Thread Starter
Further listening suggests:
Noise when accelerating (humming)
Noise when decelerating (louder humming)
No Noise when "just" on the gas a bit
No Noise in neutral while coasting
Noise when accelerating (humming)
Noise when decelerating (louder humming)
No Noise when "just" on the gas a bit
No Noise in neutral while coasting
04-23-2015, 09:19 AM
#6
Out Of Control!!
Do yourself a huge favor---put the car on a lift and duplicate the issue---wada ya hear or see.
Without that my guess is the noise is from beer bottles rattling around in the trunk
Without that my guess is the noise is from beer bottles rattling around in the trunk
04-23-2015, 09:45 AM
#7
MBWorld Fanatic!
CENTER SUPPORT DRIVERSHAFT BEARING PROBABLY HAS EXCESSIVE PLAY. WHAT MILEAGE DO YOU HAVE ON YOUR VEHICLE? AND WHAT MAKE AND MODEL.........
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05-26-2015, 06:06 AM
#9
Super Member
Thread Starter
Nobody is willing to tear into the differential but they all believe it is definitely gear noise ie. Crown/pinion gear. I am trying to source a used e55 complete pumpkin to be installed.
It is not the csb unfortunately
It is not the csb unfortunately
05-29-2015, 12:57 AM
#10
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Join Date: Dec 2013
Location: Bay Area, CA
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2003 e500
I have an '03 E500 and I get that same humming (higher pitched almost like a whistle) sound when I am between 70-75 mph. I slowly let off the gas and once I let off a few degrees, the humming goes away.
I was also curious as to what would be causing the sound.
I was also curious as to what would be causing the sound.
05-29-2015, 10:55 AM
#11
MBWorld Fanatic!
Is this a humming or howling noise? There is a difference thats why i am asking. If its howling, probably your rear diff, humming i would like to think is a wheel bearing. However if you have those bull***** AS3's on your car they could as well be producing some noise....
05-29-2015, 01:16 PM
#12
Super Member
Thread Starter
Typically a wheel bearing will get worse with speed & will obviously become louder when loaded up more ie. shifting weight from one side of the car to the other. Don't discount what crmiv said as well, I am amazed at how noisy some tires can be. With that said, I find Michelin's to be one of the quietest brands.
If you cruise at 75mph & throw car into neutral does the noise go away? If noise, goes away then try increasing RPM to that 2,000-2,500 & see if noise comes back. Post up results
If you cruise at 75mph & throw car into neutral does the noise go away? If noise, goes away then try increasing RPM to that 2,000-2,500 & see if noise comes back. Post up results
05-29-2015, 08:12 PM
#13
MBWorld Fanatic!
updated as3's
Typically a wheel bearing will get worse with speed & will obviously become louder when loaded up more ie. shifting weight from one side of the car to the other. Don't discount what crmiv said as well, I am amazed at how noisy some tires can be. With that said, I find Michelin's to be one of the quietest brands.
If you cruise at 75mph & throw car into neutral does the noise go away? If noise, goes away then try increasing RPM to that 2,000-2,500 & see if noise comes back. Post up results
If you cruise at 75mph & throw car into neutral does the noise go away? If noise, goes away then try increasing RPM to that 2,000-2,500 & see if noise comes back. Post up results
