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hey spencer try putting about 200 lbs of something or other in the back end against the doors and then see if it does the vib


I have two 100lb tractor wheel weights sitting beside the truck now. I will put them in and see when I go out tonight.

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when you feel the vib start take the throttle back a bit and see if it stops


It absolutely stops vibrating. All I have to do is drop back off the pedal and get boost down to 8-9psi or lower and it will stop.

So a new, heavier driveshaft will take care of this ???

NCDiesel