2001 Other Ford Models vibrating when driving

Check the tranny mount at the tailshaft.

[quote:8958f55b9e="drhyne"]Drive Train Axles Bearings problem
2001 Other Ford Models V8 Two Wheel Drive Automatic 163000 miles
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I bought a 2001 Ford E-150 Cargo van. It has the large V8, auto.

It had a vibration -- tire bounce when I bought it -- put all new ball joints on it, new tires, and still vibrated when trying to maintain a speed or slow gas pedal. Replaced both u joints and still have the problem. When I get off the gas pedal there is little to no vibrations or bouncing of the tires. When I attempt to maintain present speed is where the vibrating is the worst. If I gun it the vibration goes away till I return to easing on the pedal for maintaing speed. Any ideas? Could the drive shaft be out of balance?[/quote:8958f55b9e] The mount is solid and bolts are tight. Any ohter thoughts on what it could be????

Check the drive axle, I had a similar problem and last 7 months to find the real cause of a vibration, I made pretty much the same you did, the cause was water into the drive shaft tube, that causes a inner carboard filling into the aluminum shaft collapse, and then causes a lot of vibration. a drill was detected at the end of the shaft, what it is for? no idea.
I change the drive shaft for an steel one and problem gone.
Sorry for my English, I live in Mexico and hope you find this information usefull-