Have a drive issue the left side doesn't seem to have the power it should and there is a chattering noise coming from the down in the drive on that side all the bearings are new so I know its in the hydraulics
Chattering can be the chain tapping on the chain case too.
If you swap drive motors, see if the problem changes sides. If so, it's the motor, if not it could be the pump or inside the gear reduction box.
