i have jd 630 that i was putting rim & tire on . I worked on it one day and got half the wheel lugs on it. I would put one on at a time and then turn the wheel alittle in order to get the weight off the spot for the next lug, the next day I decided to try to start the tractor to run some extra antifreeze throught it that I just added, it wouldn't start felt like it was stuck, so I decided to finish the wheel lugs and then I would try to pull start it,however when I took it out of 5th gear because after turning the wheel alittle to put on the next lug I would put it in gear so it wouldn't turn while I put in the lug. it felt like it came out of gear fine but the wheel won't turn as if it is stuvk in gear. Any thoughts and if is stuck in geqr whats easiest way to get at it to unstick it, It was warm the day I tried this so I don't think it is from cold weathe ror moisture built up freezing,