Lee, those kinds of vibrations can also be in the tranny, bearing going bad, clutch plate, and definetly the drive shaft...haven't bottomed out have you? LOL....oh, and a U-joint can cause those vibrations as well....put her on a lift, move the drive shaft around, push up on it, look at the U-joints, see if there is give in any of them...did you get my address btw....good luck my friend