Hey Steve thanks for the encouragement. I think you may be right about the air in the lines. I've been messing with it so long that I'm worried about burning up the stater. Maybe I'll get one of my coworkers to drag me around the lot with the forklift for a few minutes at a time. Btw we are also putting a 4b in a Scout II, and my friend has one in his Scout 800. All are built for rockcrawling. I might rebuild the core for a driver Scout . What kind of mileage are you getting? I appreciate everyones help. If you want to take a peak at my project so far go to jayhawktrailers.com go to about jayhawk then click on Erik's rockcrawler.