is the for /rev servo different than the other servos on the lst?meaning that servo engages the forward and reverse,but would it be different than a throttle servo.where that controls full and closed but also travels the opposite direction for brake,like most servos.

The steering servos are JR Z590's while the tranmission and throttle servos are JR Z270's. The direction of travel is actually controlled by your radio settings...not the servo itself. You can reverse the settings (through the radio) on a servo and have it act "backwards".