Vibration after hitting 50 mph

have you checked you u-joints i had that problem mine would vibrate at certain speeds thats what i would check and even check your front axle u-joints i just had to replace mine so i hope that helps you out

Sounds like U-Joints, as the prior person stated. That or death wobble, but death wobble only occurs from being out of alignment, might have that looked at too.

ya and you would tell if its death wobble you would get a real bad vibration like the steering wheel would wanna come out of your hands lol