Drive line knock

Hey guys
I have had my gator for a year now and it has always had a small drive line knock and it's slowly getting Lauder. The noise only happens when you let off the gas and go again or stop on a hill and go.sounds to me like too much slop in the transmission.
Doe anyone's gator do this?

And also the clutch engages rough it seems and slugs ahead when traveling at a slow pace the belt is brand new and hasn't seem to help anything

Any input would be helpful
ThAnks