Every once in a while when I put my Ram in reverse it makes a clunking noise sounds like the trans mount any opinions?

 

Check the mounts, and u-joints.

 

X2. My money is on the driveshaft U-Joints.

 

could be mounts, u joints or rear diff gears. . . how many miles on your truck? i doubt its the rear diff if it sounds like its under you but i've seen a lot of play in some rear differentials where the fluid was low and the gears wear out. take a pry bar and pry around on the trans mount. if it moves easily i'd look into replacing it. also like stated above; check the u joints. when they wear they clunk whenever changing direction. (ie forward to reverse/ reverse to forward)

 

My truck as 87,345 miles on it I just recently changed the rear diff fluid didn't she any metal shavings in the old fluid so I think it's ok I'll check the u joints and the mount and see

 

Yep the front you joints were busted the was the clunking :/