vibration and shaking

without more info I would suggest having your u-joint looked at - if they are good have someone check the rear differential for potential problems - that's where I would start

The shaking only happens when in drive and when I let my foot off the brake. The rpm idel is ok. The u joints are new and the rear are all good

the tires are all good as well?

Yes, tires is good, I even had the drive shaft balanced.

how about the center support bearing for the driveshaft

Any chance you lifted the truck? if so, its possibe the problem is bad drive angles

I just read in a dodge forum that the center support bearing is the common cause of this problem

Truck is not lifted, will check the center support bearing. Sometime when I let the brakes off slow the truck shakes but stops as soon as I hit the gas.

If you have after market rims on your lifted truck, I would look into centric rings for those rims that fit your year and make of your truck. Even though you have centering luv nuts, that is still not the cure for vibration. I would look at videos with professionals on centric rings.