Hi,
We have done a Coyote and 6R80 swap into a 1963 Falcon. Runs fine but we are having issues with the transmission. The engine and trans were bought out of a wrecked car. When we got it all together the trans only had third and fifth gear. Had a Ford tech look at it and he was unable to control any of the solenoids with his scanner like he was supposed to. We took the trans harness out of the car and found some smashed wires and also 2 cut wires. We have repaired these and check the resistance of the wires from the ecu to the trans and all appears to be good. Now that the harness is repaired we only have first and 3rd gears. We did install a PowerbytheHour harness and ECU which was supposed to have a stock tune in it for a 2014 Mustang. Not sure where to look next. Doesn't seem to be an internal issue. Any ideas?
Thanks
Brian