Intermittent vibration at high speed

[ja_cain]

Turned out to be my front drive shafts rotating inside the wheel bearing housings. Because my hubs weren't on the truck, the drive shafts weren't parallel to the axle housing and were vibrating inside. It's hard to explain but the problem is fixed now. Thanks everyone for the help.

I thought that might have been my problem initially and secured my front axles but didn't fix my problem. That's cool you figured it out. So many people chase problems like this and throw a lot of unnecessary money at it to no avail. I'm glad I was also lucky and figured out my vibration problem. It was a nice relief.