Thanks so much for the help. I am hoping to track down a vacuum pump today. Whenever I am testing, is there a certain amount of pumps I need to do? I sure dont want to put too much vacuum on the valves, or anything. Also, do you think that I should change out the solenoid? It appears to be working fine(goes into 4wd fine, light comes on, etc)? I really hate to spend alot of money on stuff that doesnt need replacing. But if you think that could be the culprit on causing the check valve to mess up (dont really see how) or the act to grind, I can replace it. Thinking through the system, if it were to leak some, (the sol that is) could it cause it? or shouldnt the check valve right on the other side of it stop the leak even if it did? That make sense?