I have a Troy Bilt Bronco, vertical tine tiller.  The unit looks very new & runs great.  However, the transmission shaft & worm gears are badly worn for some reason.  I could replace the shaft & gears but the cost is prohibitive for the value of the machine.  I would like to find a good used transmission assembly if possible.  The transmission model is 618-07010 (replaced with 918-07010) and the S/N is 1C115P20252.  The tiller model # is 21A-70M8766.  Any help is appreciated.
	
		
			
		
		
	
				
			 
 
		