Driveline vibration

[raz]

Hello all I have a 2500 4x4 .
I have a vibration between 45-60 mph if a trailer is attached the tongue jumps up and down. I have been back to the dealership 3 times . They rotated and balanced the tires every time I was there . It seems like a driveshaft issue or u- joint I was wondering if anyone had the same problem. The truck has 11,000 miles
Thanks

 

[elephantrider]

is it the same trailer?

 

[H3LZSN1P3R]

If the tongue is bouncing the trailer is not balanced properly, could be an unbalanced drive line an easy test if pull the front shaft and go for a drive if its good then you know the issue if its not better throw the front shaft in and remove the rear shaft and take a drive in 4wd see if the issue persists

 

[raz]

If the tongue is bouncing the trailer is not balanced properly, could be an unbalanced drive line an easy test if pull the front shaft and go for a drive if its good then you know the issue if its not better throw the front shaft in and remove the rear shaft and take a drive in 4wd see if the issue persists

It's definitely the rear of the truck .it's any trailer

 

[H3LZSN1P3R]

It's definitely the rear of the truck .it's any trailer

Then you have a bigger issue if the trailers are bouncing up and down from the truck