157" Shudder fix?
#1
Member
Thread Starter
157" Shudder fix?
I was taking a look under my 17 157" and noticed something I've never seen before on these trucks. It looks like a counter weight, possibly to try to fix the shaking issues some have. My truck does not have the shakes thankfully. Wanted to post to see if anyone else has noticed this unusual part bolted to the transfer case?
#2
Senior Member
It is an axle shaft damper. Part # 4A263 in drawings. It dampens vibration, but it may also mitigate axle wrap under heavy acceleration.
Last edited by GMC to Ford; 02-21-2017 at 09:30 PM.
#3
Ford has been hanging various rubber dampened hockey pucks and other chunks of rubber and metal under their cars and trucks since the late 1980's. I'm sure it's for a reason, but I wouldn't count on it fixing anything.
#4
Senior Member
The drive shaft dampener is a common failure item on the Ford Explorer with high mileage. I have not heard of any issues with the trucks, but it should be the same. The rubber dry rots over time. Ford is notorious for engine mount failures for the same reason. The engine mount failure is accelerated by engines with the start/stop feature or cylinder deactivation. My user name "GMC to Ford" is the result of multiple vibration issues on my 2015 GMC (engine mounts, transmission, drive shaft, tires, 4x4 transfer case, etc.)
Last edited by GMC to Ford; 02-21-2017 at 10:57 PM.
#6
Senior Member
Here's an example of a 2015 truck without the damper.[/QUOTE]
Yup 15 does that. As did the 13 before it.
Yup 15 does that. As did the 13 before it.
#7
I dont believe this is my issue nor I do have a 157" with 80mph shake. I never noticed it untill having my tires rotated and balanced. They however did not balance the rear tires. Could not re balancing rear tires cause a vibrations? (not in steering wheel)
I did not complain about only balancing 2 wheels, since it was free from my local costco.
I did not complain about only balancing 2 wheels, since it was free from my local costco.
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#8
Yup 15 does that. As did the 13 before it.
[/QUOTE]
Yep. My father's 2010 too, even my 1984 truck did that. The video actually shows the results of axle wrap at launch. The rear axle housing twists the springs up under initial load and then bounces a little on the twist. The bouncing shown was the result of the leverage placed on the drive shaft and the change in u-joint/driveshaft angles as the axle twisted.
If the person that posted that video really wanted to post a video with some movement they should point the camera back towards the rear axle housing and springs.
Reference end of page two
http://www.fev.com/fileadmin/user_up...ntegration.pdf
This article does not explain the specific application of the rubber/metal hockey puck mentioned in the thread, but the other behaviors mentioned in the thread.
[/QUOTE]
Yep. My father's 2010 too, even my 1984 truck did that. The video actually shows the results of axle wrap at launch. The rear axle housing twists the springs up under initial load and then bounces a little on the twist. The bouncing shown was the result of the leverage placed on the drive shaft and the change in u-joint/driveshaft angles as the axle twisted.
If the person that posted that video really wanted to post a video with some movement they should point the camera back towards the rear axle housing and springs.
Reference end of page two
http://www.fev.com/fileadmin/user_up...ntegration.pdf
This article does not explain the specific application of the rubber/metal hockey puck mentioned in the thread, but the other behaviors mentioned in the thread.
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Aj06bolt12r (02-22-2017)