Quote Originally Posted by 40FordDeluxe View Post
..... My biggest problem was the pressure switches was they wouldn't allow the overdrive to turn off until the pressure dropped below the switch range. I tried different PSI switches and got tired of messing with it so went to toggles.
Ryan/Mike, that problem is caused by the switch having too much hysteresis, or non-adjustable hysteresis - big word for the value between the set and reset points is too wide, and/or cannot be adjusted, caused by the stiffness of the spring/diaphragm in the unit. What you really need is a unit that allows you to adjust the set point, and then set the value where it resets, or opens back to shelf state. You might even consider a digital pressure transducer if you want to get fancy, but one of the dual adjustable units is good if you know the pressure range and set points you're working with. Google 'pressure switch adjustable hysteresis' and you'll see a bunch of options. Hope I'm not preaching to the choir here....