There is a 4230 quad range going on a sale this week in Iowa it has rear end problems. The guy said the owner had started it in gear(dumb idea) and it went up against a tree before it stopped. I am in Wyoming so I can't look at it any probable things? Do you think it is in the rear end like ring and pinion or in the quad? He said it rolls fine won't move in gear. The tractor runs good. 7800 hours very clean lots of rear weights a spray tank on front and h/ac clean cab. What is the value considering the questionable problem? I am experienced with the quad range as all of my tractors have the ps tranny. Thanks