Ok now i noticed that my truck started to shake when going 60 to 70. I got home, got under the truck and noticed that the drive shaft was bent. So i went to the junk yard found another one that wasnt bent and replaced that one. Drove the truck around and no more vibration. But now the truck i guess "hop's" at 55 to 60. i was wondering if anyone thinks that the u-joints are bad or does the drive shaft need to be balenced again. i really dont know what will cause it.

 

First of all - How did the drive shaft get bent ? And what is a hop ? Can you describe that a little better ?

 

Lol I bent the drive shaft I think from four wheeling with a big load for camping. And I guess it starts to bounce up an down from the rear when going at 50 to 60

 

I have never bent one - they usually twist apart in the middle ! First thing to check is the U-joints for play, there should be none. If there is no play try unbolting the rear and rotating 180deg, see if that changes anything.

 

Alright I will try that

 

I am going to try that also, my truck as a shake between 35-45, even with a rotation and high speed tire balance. I have a slight damage rim on the back left but the truck did not do it when I bought it.