FRIENDS...IF ANYONE CAN TELL ME WHAT'S WRONG WITH MY PTO I WOULD BE SO GRATEFUL. I HAVE BOTH 72 AND 73 COMMERCIAL 10A AND 12 MODELS BOTH DOING THE SAME THING. THROW ROD SEEMS FINE...REPLACED SHIPPER SHAFT AND TRUNNION BLOCK...DOG GEAR IS NEW...WHAT THE %&$%&!!! COULD IT BE THE CLUTCH ON THE...