If your battery was disconnected would that reset the on-board computer chip, if so, would that affect how the tranny shifts? How long does it take to re-program itself to behave prior to being reset?

Thanks,

99 expedition 5.4l

 

Disconnecting your battery will NOT cause your vehicle to shift any differently. The ECU in your vehicle is comparable to a PC hard drive. It remains idle when unplugge, but, does not lose any data stored in the hard drive. When repowered, the hard drive continues running the stored program. There is a file written into the Superchip to increase the fluid pressure by 20% in the tranny to improve the firmness of the shift.E-mail me for further explanation or info. ddracing@worldnet.att.net
D

 

I'm not sure about the shift points, but, I usually have to clean the throttle body on every vehicle that I disconnect the battery in order for the idle pattern to be normal so I can deliver the vehicle back to the person without them complaining of an unstable idle while the computer is relearning the vehicle/driver characteristics.
Phillip