Took 4 gallons of oil but I finally have all or at least most of the water out of my tirm/tilt system (milk is gone). When the drive is in the full down positon I drive it up with the trim switch and it will drive up until full up and then will automatically shut itself off. But..... when I drive it down when the drive gets in the full down position the motor will slow and act like it's under a load but will continue to run,,, is this normal or should it shut itself off when full down??? In trailer up position it does the same thing, it'll bog down but continue to run.. Normal or AbyNormal...