I'm having a problem whenever I let off the gas pedal I get a vibration through out the whole truck and when I hit the brakes it only gets worse and I can feel it through the steering wheel and brake pedal. I was thinking that i have a warped rotor, but would that make the truck vibrate without hitting the brake? My next asumption would be the bearings. If that is the case, what tools are required to change out the bearings and where is the best place to purchace.

 

If it changes when off/on the throttle, it is likely a u-joint on the rear driveshaft.