The drive clutch is locked on the end of the crankshaft. It MUST turn anytime the engine turns unless its slipping on the shaft... Unlikely but I have heard of it... Never saw it though.
Start the machine in Park or Neutral with the belt cover off. When you rev the engine up is the drive clutch closing and grabbing the belt? Is the belt being pulled down into the secondary clutch making it spin?
If the answer to both is YES, then it is NOT a clutch or belt problem!
The problem is in the tranny/rear end.
With the engine off and key on can you hear the turf mode solenoid in the rear end working in and out when you flip the switch in and out of turf mode (up/center positions)? If not, see if you have power to the solenoid... fuses, wires etc.
If the rear differential lock solenoid/turf mode seems to be operating:
Jack it up and get all four wheels off the ground for testing.
Start the engine. Put the AWD switch in 2x4 (center position) and shift to High.
Give it some fuel... Do the rear wheels turn?
Try it in AWD (down position). All four wheels should spin.
Try it in turf mode (up position). One wheel should spin.
Let us know what you find.
If you get no joy and its been a while since the tranny oil was changed, drain the tranny oil into a clean container and inspect it for metal.
Last edited by polman500; 06-22-2019 at 07:03 AM.