Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - A few automatic transmission questions and ideas

jeongyun · 03-31-2012, 08:14 PM

Do the latest automatic transmissions have any mechanical linkage between shifter lever and the transmission?
I'm guessing they don't though.

I was thinking what if I intercept the signals from selector lever to TCU (transmission control unit), and let it go into Neutral automatically when I'm coasting and put it back to Drive as soon as I accelerate. Of course there are many other cases to consider but you get the idea.

I looked into intercepting or overriding TCU but that seemed too difficult with modern ATs but faking the driver input seemed to be easier.

03-31-2012, 08:14 PM	#1 (permalink)
jeongyun EcoModding Lurker Join Date: Mar 2012 Location: Ottawa, ON Canada Posts: 27 FFE - '17 Ford Focus Electric Thanks: 4 Thanked 4 Times in 4 Posts	A few automatic transmission questions and ideas Do the latest automatic transmissions have any mechanical linkage between shifter lever and the transmission? I'm guessing they don't though. I was thinking what if I intercept the signals from selector lever to TCU (transmission control unit), and let it go into Neutral automatically when I'm coasting and put it back to Drive as soon as I accelerate. Of course there are many other cases to consider but you get the idea. I looked into intercepting or overriding TCU but that seemed too difficult with modern ATs but faking the driver input seemed to be easier.