My truck has a vibration at 35mph and I never quits no matter how fast you go. I have taken all six tires off and rebalanced them, and they were out of balance and that helped. The vibration is more a bounce and it can get really bad like it is going throw you off the road. I checked the tie rod ends and ball joints and didnt notice any slop. any ideas, could wheel bearings cause it. I dont feel the vibration in the steering wheel as much as I do in the seat of my pants.

 

Carrier bearing?

JP.

 

Check your drive shaft for a tight u-joint.

 

U-joints, Carrier Bearing, wheel bearings or a worn/cracked spindle,
worn/missing engine or tranny mount...
even a missing exhaust hanger or bend that allows the pipe to touch the floor..missing/worn body or truck bed mount...
the list could go on....

I belive if it were driveline related, you would feel it more in the wheel than the chasis, so I would start with a good thorough underbody inspection as a first step...

 

x3 on the U-joints. Replace all the rears with Spicer.

 

Look if one wheel has a lot of weights on it. warped wheels will also cause this.

 

my truck has a vibration sometimes around 70, but not always and alot of times its only under acceleration and when i back off its not as bad or stops. everything is in check so i've not done anything about it.....?

 

You say you balanced the tires? Did you check them for tread bulges? I had one that was so bad it acted like a wheel chock at slow speeds! If it is a bounce in the truck not just a humming vibration I would think it is directionally parallel to the tires. Maybe wheel bearings, carrier bearings in the diffs, Front axle u-joints and bearings if 4x4, I don't know if you could bend an axle shaft?, Any thing rotating the same as the tires. Now if it is a buzzing like vibration and can be felt at speed through the shifters or floor, it probably drive-line U-joints, pinion bearing, slip joint in shaft. I guess engine mounts could cause a bouncing effect.

Most of what has already been said is what I would guess also. My brother had a bad vibe and bounce with his 1/2 ton 94' but I think it was death wobble. Not sure.

Thats my .02

 

Don't forget a warped rotor or caliper hanging up could also cause some of this...Mark