I have a 2010 ranger 4x4 with the 4.0 and every time I seem to give it more than 1/2 or 3/4 throttle it will downshift, take off then try to grab the next gear but hit a neutral and hit the limiter. I have to manually put it into a gear or if I let off for long enough it will sort itself out. Would too much fluid do this? Or does this seem like a different issue.