bad vibration problems

I kinda thinking vibration dampener on the engine. Anything driveline related shouldn't go away after a few miles. I am thinking once the engine warms up the dampener starts to work. A weak injector can do this too.

 

The only way to check a damper is to cut it apart to see if the fluid has dried up, but then you'll need a new one anyway. I would replace your level valve and check ride height. A KW dealer can print the page with specs and pictures of where to measure. If you have not replaced the engine damper, I would put a new one on. I think Mr. Haney sells a good damper. My truck ran smoother after I replaced mine.

 

Will the vibration stay the same if you change gears but are going the same MPH?

^ that will help narrow it down.

 

Sometimes U-joints don't appear to be bad until they get taken apart.

 

the first thing that came to my mind is flat spots on the tires from sitting that evens out after a short time but you guys are getting too technical for me so perhaps it is internal-

 

i am having a vib ration problem between 45/50mph