One of the main differences as I recall is that in the A245E the boost pressure was still provided by a cable from the throttle to the VB unlike the A246E which uses a pressure control solenoid for this. I happen to have the GM trans rebuild manual for 2000 which also has the A245E in there (for the Prizm) but there is not much info on the TCM.Since this is a reprogramming kit for that TCM no idea what it will do in a Vibe - may not work. You can contact and ask them though.