I have a JD 4630 with a power shift in it, Was in park ( I was not in tractor) filling a sprayer on a slight incline and was about full (1350 Gallons), when it jumped out park, rolled back about three feet and jumped back in park!! When I got into the tractor I checked the shifter seemed to be in park, but now goes into park very hard, I like this old tractor never had a problem with the shifting before, want to fix this? is this a major fix or can I do it??? Thanks for your help . 101 Virgil Smith
