Well, i've been troubleshooting my elect. 4x4 problem (just get a clickin' noise in dash when i push the button). I've got the electronic box testing fine..four blinks ect..., when I sprayed up under the bronc today to clean it up so I could work on the transfer case I noticed the vacuum line coming out the top front (drivers side) is broken and has a bolt stuck in it. Um ...where does it go to? I'm thinking since the line goes into the case its either a vacuum or an overflow, am I close? I want to figure this one out before I start pulling the switch and actuator off the backside to be sure that the line being cut isn't the problem with the no shifting. Thanks for any help you can give.