In case others have an issue when changing their throttle/brake servo. The fail safe can be programmed, this is what caused my throttle run away. Just follow the instructions:
Fail Safe Break Setup:
Connect the fail-safe unit to throttle/brake servo and receiver
Be sure to observe the polarity of the wire leads.
Apply full brakes on transmitter and press the set key for two seconds until you see the flashing red light pause.
Check the function prior to actual operation by turning on the transmitter and moving throttle stick up and/or to brakes position.
To test, turn the transmitter off to insure fail safe has applied brakes.
Fail Safe Break Setup:
Connect the fail-safe unit to throttle/brake servo and receiver
Be sure to observe the polarity of the wire leads.
Apply full brakes on transmitter and press the set key for two seconds until you see the flashing red light pause.
Check the function prior to actual operation by turning on the transmitter and moving throttle stick up and/or to brakes position.
To test, turn the transmitter off to insure fail safe has applied brakes.