Get it fixed. My little 1440 never went in third quite right I thought, but had no trouble...until it jumped out of gear going down a 1/2 mile blacktop hill on our place this year. I got it stopped with out dropping the corn head by standing on the brakes, but would not recomend doing it daily. Used up a lot of hill doing it. Thank God I did not meet any of the normal traffic, or I would have to run it over the side, and it is a long way down. ( they pick up speed fast. )