CitroJim wrote:...I've a feeling the 4HP20 ECU takes a lot of various signals to come to it's conclusions about which gear to select and when.
AL4 is the same. Road speed, RPM, fluid temperature, mode selection, throttle position, kickdown actuation ("excition"
) and I think somehow - maybe by pressure sensing? - the incoming load via driveshafts (as it doesn't have an inclinometer).
I had a look at SC and the auto box does have a different TPS thn the manual. Maybe it's a double ganged pot?