New R65 doing edible beans started having a problem with hydro drive in higher gears lets say 3rd gear 2 wheel drive push the hydro forward combine starts moving (duh) but it's like elastice maybe 500 ft. before combine catches up with hydro lever position no power demand from engine first thing I did change filters no help, called the dealer did presure tests everything is normal, changed poppet valve in charge filter head. changed oil nothing helped ran it for a week like that, dealer decided to put new hydro in but the day before he gets here I notice everything is fine that was three weeks ago anybody ever have a problem like that