OK guys, I posted a few months ago about a rearend bounce that had/still have. I had the tire rebalanced and it helped some but it was still slightly noticeable but acceptble. Well It started getting worse when tires were at about 5k on tire balance so I took it in for another balance. I spoke with tech and tires balanced well and the problem is still there. It is usually between 55-65. It is not noticable at up to 50 and from 70-90, i have verified. I am thinking it may be the ujoints.

How do a test them?

 

My truck does the same thing you can see it in the rear view mirror it vibrates. Why do you think u-joints?

 

Seems like a common issue with our trucks. It feels like something with the driveline. I am putting shocks on in a few days to make sure its not them.

 

Yeah it's strange only at those speeds though between 63-67mph other then that smooth sailing. I thought it was my new tires and leveling kit but all the people on here makes me unsure.