Right now I am just running a toggle switch for overdrive ( when I want it to shift just hit the toggle) the biggest downside to this is you have to remember to switch it out of overdrive when you slow down. I would like to come up with a better system that would automatically cut out OD below a certain speed. I am also running a toggle for lockup of the converter. I like having the complete control as to when the converter locks and it will quickly remind you if you don't unlock it when you slow down. Only did that once. I was worried about what would happen if you inadvertantly locked when stopped in 1st gear but I learned that it will only lock up in 2nd and higher. Lowell