I have a Bolens G152 and almost everytime I change gears the they grind.  I have had this tractor for 2 years and talked to the mechanic that worked on it before I bought it.  He said that he had replaced the clutch a few months before I bought the tractor.  I have tried adjusting the linkage, but it did not help.  Any ideas on what might cause this problem or how to fix it?
	
		
			
		
		
	
				
			 
 
		