Vibration and slight growl under 20mph

[PanteraHD]

I have a 2013 Ram 2500 4x4 Tradesman, 5.7 L Hemi with 165K miles. From 0-20mph or from 20-0mph I can hear a very slight growling sound coming under the truck and I can feel slight vibrations in the gas, brake & floorboard. I have changed the following parts with no fix. It still has the same problem
Two Front Wheel Hub Bearing.
Two Front Axle U joints.
Two Front Rotors & Pads.
Two Back Brake Pads
Driveshaft Ujoints.
It still does the same thing. I took my front drive shaft off hoping it was the ujoints in it. But it still does it. I lifted the back of the truck and put chocks in the front and put it in drive and got up to 20mph. ( I wanted to see if I could hear a bearing noise at the Transfer Case or Rear Diff) I did not feel any vibration or hear any growling. It seemed like it may be something in the back. With it lifted off the ground and in drive. It was smooth as silk. I wonder if the problem is a back Wheel Hub. But I feel the vibration at my feet. Im not sure if I'm testing this correctly or diagnosing this correctly. Any help would be appreciated.

 

[Squatch]

You check your upper and lower ball joints?

 

[PanteraHD]

You check your upper and lower ball joints?

I just checked the front driver side ball joints by lifting the wheel and putting a crowbar under the tire and lifting up several times on the crowbar. I saw the shock moving up and down and no movement from the ball joints. I moved to the passenger tire and noticed as I moved the crowbar up and down. I could feel and hear a metal on metal sound and noticed the shock was not moving up and down like the driverside. I did not see any movement from the ball joints. I also could not see any where else it would be hitting making that sound I also noticed that the Ujoints was not replaced yet on the passenger side tire. I wonder if the ujoints is a problem

 

[PanteraHD]

I changed out the passenger side U joint but it did not fix the problem