So I've had a vibration in my truck since I bought it. I had 2 u-joints changed under waranty which cleared up most of the vibration at speed, but its still an issue. Now it can be felt through the gas pedal AND floor, in the back seat its really noticable. Whenever I step on the gas or let off it happens for a second as it passes between 1000-1500 rpm. I think its gotta be coming from the tranny but the dealer seems to think its normal. Anyone else have this issue or any idea what might be the problem???