l 95 Trans Am l

iTrader: (5)

Ok so I've had this problem for awhile but it hasnt really reared its ugly head until the past week. First and foremost, its not the common 5th gear vibration, or at least i dont think it is. When im in neutral, and I slowly work the RPMS up, theres a little vibration gets a little worse at higher rpms, however that vibration is nothing compared to the driving one, I dont think its the motor mounts, when I was manually giving the car shots of gas from under the hood, the engine seems to stay put (ya know that old trick where if your mounts are bad the engine flexes bad when gas is given?). As for the driving vibration, when im in 4th or 5th just cruisin at 50-60, its that bad that the shifter bobs up and down and the passenger seat is having a spaz attack, i could also feel it in my right leg, so im thinking it has to be something in the driveline. I'm thinking U-joints or trans mount. But I've also been told the driveshaft could be bent?