I just recently purchased a 2001 John Deere 4700 with a 460 fel and a 48 backhoe. I didn’t really use it when I got it and changed every fluid and filter with all John Deere stuff. I recently stated to use it and noticed that sometimes if your using it that when you let off the pedal it seems to keep going unless you push the opposite pedal. I also noticed (especially at an idle) that the tractor doesn’t seem to like to move sometimes, just the little bump going up to the garage it won’t go up unless you throttle it up or get a running head start. It is worse in the higher ranges, in a it’s not as bad.