Hey guys looking at buying a 1978 JD 4640 bout 5600 hrs never have owned a green tractor are there any major things that commonly happen to these tractors? Is there things I need to look for? Guy tells me it grinds going into gear sometimes this tractor has the Quad Shift? Had someone tell me that is a problem with these machines is that so???? Thanks for the help
JD 4640 Question
