jazar10

So since I got the truck, 06 5.4L XLT (FX4 interior), I have had a mild to extreme vibration in my truck when trying to conserve gas and somewhat slowly accelerate. It usually happens when it shifts from 1st to 2nd. Odd thing is, when It shifts it Drops down to 900 RPM then pulls back up to 1200 RPM almost as if it made a mistake shifting. When It does that, It does a weird vibration throughout the cab.

Any Idea's??!?! In about 2 weeks I'm driving about 800 miles to visit family in Kentucky and want this fixed without spending a ridiculous amount of money.

Also, Just had plugs and coils replaced... and brakes/rotors... So I have spent $1400 in like a month on it.

Thanks!