I have a massey 6180 that will not powershift when it is moving. If the tractor is stopped it will move through the powershift gears just fine. Once it is moving it will not shift unless it comes to a full stop again. I have changed the filters and checked the wiring the best that I could. Any help would be much appreciated. The only dealer is 50 miles away and they just opened 6 months ago so there is no help there. Thank you in advance.