rear end braking and vibration problem, help!
#1
10-09-2007, 10:45 PM
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rear end braking and vibration problem, help!
I've had a minor intermitent vibration in the rear of the vehicle and I'm not real sure where it is comming from. Its not related to the gas pedal, on the gass or off the gas, sometimes its there and sometimes not. I have a 99, 5.2l 4x4 5 speed. Sometimes it starts and I can surge the gas pedal and it will go away. Others when I come to a stop it will start when I apply my brakes. It feels like an out of balance tire, but its not consistent in when it happens. I am taking the wheels and drums off tomorrow to check the wheel bearings as stated in the haynes manual. I have also checked the u-joints, they are all good and tight. Any thoughts?
#2
10-10-2007, 12:04 AM
RE: rear end braking and vibration problem, help!
Well, you can check to see if the problem is in your rear brakes very easily. Get going 45-50mph and with one hand holding the release for the e-brake, apply the e-brake but not your main brake pedal.
If your vibration is present during this test, you have possibly warped drums.
I used to say with 100% certainty that you would have warped drums, butI recently got mine to do the same thing so I took the drums in and had them turned and it still did it. After checking around, I found that my axle U-bolts were loose enough to get 2 turns out of each nut. After tightening them, the vibration went away immediately, so there are no absolutes. I would however bet big money that if your vibration is present during this e-brake test, your drums are warped and need to be resurfaced/turned.
Good luck with it.
If your vibration is present during this test, you have possibly warped drums.
I used to say with 100% certainty that you would have warped drums, butI recently got mine to do the same thing so I took the drums in and had them turned and it still did it. After checking around, I found that my axle U-bolts were loose enough to get 2 turns out of each nut. After tightening them, the vibration went away immediately, so there are no absolutes. I would however bet big money that if your vibration is present during this e-brake test, your drums are warped and need to be resurfaced/turned.
Good luck with it.
#3
10-10-2007, 07:30 AM
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RE: rear end braking and vibration problem, help!
ORIGINAL: nhlbill
Well, you can check to see if the problem is in your rear brakes very easily. Get going 45-50mph and with one hand holding the release for the e-brake, apply the e-brake but not your main brake pedal.
If your vibration is present during this test, you have possibly warped drums.
I used to say with 100% certainty that you would have warped drums, butI recently got mine to do the same thing so I took the drums in and had them turned and it still did it. After checking around, I found that my axle U-bolts were loose enough to get 2 turns out of each nut. After tightening them, the vibration went away immediately, so there are no absolutes. I would however bet big money that if your vibration is present during this e-brake test, your drums are warped and need to be resurfaced/turned.
Good luck with it.
Well, you can check to see if the problem is in your rear brakes very easily. Get going 45-50mph and with one hand holding the release for the e-brake, apply the e-brake but not your main brake pedal.
If your vibration is present during this test, you have possibly warped drums.
I used to say with 100% certainty that you would have warped drums, butI recently got mine to do the same thing so I took the drums in and had them turned and it still did it. After checking around, I found that my axle U-bolts were loose enough to get 2 turns out of each nut. After tightening them, the vibration went away immediately, so there are no absolutes. I would however bet big money that if your vibration is present during this e-brake test, your drums are warped and need to be resurfaced/turned.
Good luck with it.
#4
10-10-2007, 08:12 AM
RE: rear end braking and vibration problem, help!
The Hunter Balancing Center:
http://www.gsp9700.com/pub/features/how.cfm
can not only balance the tire/wheel
but if you get a well-trainned technician who knows how to do it,
it can also mount the brake drums and balance them too.
5 Star Dodge Dealerships are required to own a Hunter GSP9700
but they call it by the Chrysler-given name.
The problem is that it is a complicated machine
and trainned operators are in high demand by independent tire shops
who 'poach' them from dealerships.
http://www.gsp9700.com/pub/features/how.cfm
can not only balance the tire/wheel
but if you get a well-trainned technician who knows how to do it,
it can also mount the brake drums and balance them too.
5 Star Dodge Dealerships are required to own a Hunter GSP9700
but they call it by the Chrysler-given name.
The problem is that it is a complicated machine
and trainned operators are in high demand by independent tire shops
who 'poach' them from dealerships.