Lately my truck will vibrate at speeds between 15 and 20. Its just in between those speeds and it is a vibration thats very noticeable. It vibrates everything... It does it no matter what, gas in or out and transmission in drive or neutral. I am getting ready to sell the truck and dont really want people to take it for a test drive with it doing that. Does anybody know what it could be?

 

inspect your u joints replace as needed

 

+1 for u joints

 

TC Shudder?

 

nm, he said neutral

 

+2 for U-joints.

 

Maybe the mid-shaft bearing?

 

I'd have your tires checked for balance first, then if it still exists, look at your u-joints.

 

Okay, so I went ahead and inspected the U-joints and found that the rear one on the rear drive shaft to have the slightest amount of play in it. So little that if it were any less it would be non existent. I'm gonna go ahead and change it since its very minor and will just get worse. But could that small amount of play in the joint cause it to vibrate the whole truck pretty noticeablely?

 

Yes. Any movement is bad. The normal forces on those u-joints are much greater then what you can exert with just your hands. So if your able to move it by hand, even just a little bit, then it is probably much worse under the force of the truck.