Check the governors driven and drive gear for any damage and debris. Something failed to cause that damage. You have to remove the rear valve body to clean the governor’s screens, they must be loaded with metal, also inspect the rear pump check valve it has been know to come apart and cause damage to the governor gears. Can you post a picture of the governor? I am updating my website I have tons of pictures.
rear valve body
The governor is matched to the engine size, tire size and differential ratio. When you call give them the ink stamp number on the governor to insure you get the right one
Call 1800 776 4433