My 06 F-150 shudders pretty violently when i let off the gas and slowly accelerate again usually around 45mph. If i let of the gas during the shudder and accelerate again it goes away. I had it at the mechanics today and they replaced the driver fuel pump module. Truck still shudders around 45mph. I took it back and they got the tires off the ground. My back right wheel had a pretty good wobble to it. The mechanic thinks thats the problem. Im not too sure. Wouldn't I feel the shudder all the time if it was caused by the wobbly wheel, not just as i accelerate? No codes.... Hope someone can help. They think the coil packs are good when i suggested it. They think there would be codes if the plugs were bad. So theyre thinking its drivetrain. I have no clue.

 

mechanic says i have a dented or bent rim could that be causing the shudder?