I recently discovered small plastic fan blades in the yard and learned they were from the transmission fan. Dealer advised not to use the tractor. The tractor is now living with the dealer(3 wks). I am advised that brackets on the drive linkage failed forcing the fan into the trans housing. Dealer has lifted the deck and I am advised they must pull the engine in order to complete the repair. I am also told this is not the result of anything I did or didn't do. The unit has over 400 hrs. on it. Has anyone had a similar experience? 