vibtarion only when pressing gas

[JOEYD0730]

i get a virbation/shake when i am on the highway at 60mph+. when i take my foot off the gas the vibration stops even if i am cruising at 65. as soon as i step on the gas again the vibration come back. if i cruise at 55 its smooth. i baught new tires and it didnt solve the problem. i dont think its a bent rim being it only does it while on the gas, thanks for any help, joe

[old_master]

Engine off, raise the rear tires off the ground, put trans in neutral, check for movement in both U joints.

[JOEYD0730]

when you say both u-joints, do you mean the two on the rear driveshaft? or front and rear shaft? thanks for the tips. joe

[old_master]

Check the joints on the rear shaft first, then raise the front of the vehicle and check the fronts, (didn't realize you have AWD).