[mavrick0]

You should always recalibrate your ESC's to the new radio and once all the calibrating is done for all trucks and all servos and everything then rebind the radio's to the RX's. With the spectrum radio's when you bind the radio to the rx is when it sets the failsafe. So when you first set things up and then change them then it will change where the failsafe will be and sounds as if the failsafe is throwing the ESC's into reverse.