MPG Cruise Control Algorithm

[theholycow]

I don't think overrunning clutches are common. In your car with a manual transmission, obviously you don't have one. In automatics I don't think they're common at road speeds. I have the complete GM 4L60E manual and read it somewhat thoroughly looking for that and a few other things. The 4L60E does have overrunning clutches on 2nd and 3rd (and maybe 1st, I don't remember for sure), but they don't get used in normal driving because it will generally shift to 4th. They also won't get used if the driver manually selects that gear, so with the gear selector in '3' the 3rd gear overrunning clutch won't overrun (and similar for '2').