Tried to cross my tires several times, gessing it could maybe be as goober86442 says its just bad tires.. Some day Im gonna get 305/70/16 mud tires for it, but its really expensive here in Norway

 

bump. I still have the same problem. Tried new shocks, new rims, new tires etc. bouncing is still there.

 

I had a similar problem years ago on an old Ford ranger and it ended up being my U joints that were shot. Could also be a driveshaft problem.

 

I would have to say that after all of you have changed, rotated, looked at tire/rim issues and changed shocks etc. that you are suffering from either bent axle shaft issues or bent axle housings. the easy way to check it is to jack up the axle and set on jack stands then take a block of wood that comes up along the outer edge of the tire. Set it as close as possible to the tire and slowly rotate the tire and watch for scrubbing on the wood block. From there it is a matter of removing items till you find the offending component.

 

I am having that same problem but at a lot of different speeds. Around 33 mph, then goes away from 38-43. Comes back from 45-60, comes back from 65ish to 75.

 

Get your tires balanced and rotated.

 

+1 on the tire balancing. A bad wheel bearing or an out of balance or bad ujoint on the rear drive shaft can cause the same symptoms.

 

What kind of tire presseure do you run. Trust me dosent sound like a lot but being in the tire business I have corrected a lot of problems by using the manufacture reccomended tire pressure that is on the door panal.

 

So at 55 mph on the driver side rear the bed will bounce I have balance to drive shaft replaced do you joints replaced the tires twice redid the rotors redid the shocks had them balanced numerous times still getting a bounce any ideas

 

Rotate the tires, see if anything changes.