Did you check the ujoints while in the air or on the ground?

 

checked the ujoints on the ground.

havnt been able to get the cover off yet to check it out, my gutters fell off and have been tryign to get that in order, lol.

 

You should raise the rear of the vehicle to check the ujoints..

 

+1 on u-joints.

Haven't done it on one of these trucks, but on other vehicles it is cheap (like $10 - 15 per set, one set needed at each the front and rear of the driveshaft (2 total)).

It is also a simple DIY job (at least on other vehicles I have worked on). So simple and cheap it would be worth it simply as a troubleshooting step, and if that is not it, well, you have new u-joints for a few bucks and an hour's time (or less).

Is it that simple on these trucks too?

 

Yep. U-joints are dead easy. The only really complicated one is the CV joint on the t-case side of the front driveshaft. (two joints, a ball and spring, etc.)

 

Drop the driveshaft and pull the u-joints. My truck was doing this for quite some time, and when I pulled the driveshaft I found a u-joint with a broken cap. The needle bearings had washed out who-knows-when, so every time I would accelerate or de-accelerate, the shaft would wobble, or flop, on that slight axis, making a clunk sound.

 

almost sounds like a differential gear tooth mesh problem. like when a tooth is chipped or missing