I have a 2000 Ram 2500 Sport that I just bought last week. I was getting a real bad vibration when accelerating between 50-65 but the vibration would go away as soon as I let off the gas pedal. Turned out it was my U-Joint on the back of the Drive shaft was bad. I replaced it and the vibration went away. However, now I get a vibration when I let off the gas pedal from 65ish-50ish. So literally the same problem just backwards???? I did however notice that when im in 4WD, I barely feel the vibration when letting off the gas. Its strictly those speeds too. Anyone have any tips? The U-Joints on the front is solid and so are the u-joints on the front drive shaft and axles. Everything is solid on it. Nothing loose or worn.

 

Got a lift? What tires? Same front and back? Could be pinion angle.


Also, could be out balance drive shaft

Does it look like anyone drug it across a rock or anything? Weights still on it?

 

285/75/16 tires, I dont think there is a lift, it does seems a bit taller, maybe a 2" leveling at best. (2) brand new front Goodyear wrangler duratrac tires and (2) almost new Kelly Safari TSR in the rear (they're pretty much the same tire and company) The drive shaft does look like it came from a junkyard so maybe I should check that out probably to see if its balanced.

 

Grab the fsm out of the DIY section.


In it is a procedure for field balancing a DS. Basically it takes two big hose clamps. If that obviously changes the vibration. Then go get it professionally balanced. If not. Then the problem is elsewhere.

 

Did you inspect the brakes? Warped rotor?

 

Really, that can cause it?