I am trying to help my dad get his 88 c3500 conversion running right. Basically we removed a carbed 454, and installed 93 TBI 454/4l80e. I wired engine/trans harness connector pins according to 1993 alldata diagram. Engine starts and runs really good, but the trans is not shifting at all. Keep getting code 24 for no vss signal. I have checked wiring from vss sensor all the way to drac module-all good-have power/ground to drac. back probed vss wires at drac, and have good ac voltage(0-7v). Back probed speed signal wire to ecu, and seem to be getting good signal there. The 4l80e is believed to be a 94up transmission. Is it possible to control newer 4l80e with 7060 ecu? Do I need to switch to 94-95 ecu? Can I use BANF memcal in 94-95 ecu? Sorry if this has been covered before, I searched for hours and found nothing.