You can move this if its in the wrong spot:eek:What could be causing the whole truck to vibrate DURING ACCELERATION ONLY!?Could it be exhaust hit frame ? race tires that have terrible toe in wear?trans?drive shaft?

Need some feed back on this on:)

I would check U-joints and yoke coming out of tranny/yoke on rear end.
Does it clunk when you put it in gear or go from D to R and back?

How hard of an acceleration or doesnt it matter? Vibrate when coasting or decel or only on accel?

Also, check rear tires to see if you threw any weights and even try rotating.
Check tire pressures, a low tire could cause a vibration too.
Possible bent wheel?
Sounds to me like it would be in the drivetrain/shaft though if its only on acceleration.
Let us know...
Mike:beerchug:

:)U JOINT @ REAR END!!!!:beerchug:THANKS

:)U JOINT @ REAR END!!!!:beerchug:THANKS

Thats what it was? Awesome! Good find!:D