[Espeefan]

Whoops, I guess I was paying attention to the wrong page numbers. Sorry guys.

Having looked over the manual though, it looks to me like SW-3 is not a switch that is directly assign to any specific channel. As mentioned earlier, it's a flight mode switch only. After studying the manual for a while, one way that I know for sure would give you control over a servo, using the 3 position switch SW-3 is to switch the programming on the radio to a helicopter model. Then I would do the following -

Plug the truck's ESC into channel 2.
Plug the shifting servo into channel 3.
Plug the steering servo into channel 1.

Now because helicopter radios mix the throttle channel with the collective pitch channel (to maintain head speed under a load) you can program the radio to make the shifting servo (what the radio thinks is a throttle servo) move to any degree you wish. In order to do that, you need to adjust the throttle curve. (T.CV) The flight mode switch, SW-3, under a helicopter model program, will control the aggressiveness of the throttle servo/collective pitch mix.

Because this radio has three possible flight modes tied to SW-3, you will need to program three separate throttle curves. One for each position of SW-3. The throttle curve will control where the throttle servo (now shifting servo) moves in each flight mode - each position of SW-3.

Pull SW-3 all the way toward you. This will be first gear. Adjust the throttle curve (T.CV) in the first switch position. The radio has 5 points on the throttle curve. Set all of these graph points to 0%. This will ensure the servo stays at it's max travel in one direction.

Push SW-3 to the center toggle position. Now adjust the throttle curve so that all 5 points are at 50%. This will center and hold the servo in a neutral position. This becomes 2nd gear on the truck.

Push SW-3 into it's last position. Adjust this throttle curve so that all 5 points are at 100%. Just like before, this will move and hold the servo in it's max travel position, but the opposite direction. This becomes 3rd gear.

After doing this, you'll want to set end points (E.P.A) for channel 3, if necessary, so that your servo doesn't bind at the extremes of travel. If for some reason you cannot reduce the E.P.A. enough to limit the travel, set the E.PA. back to 100 and do the following -

You can also adjust the throw using the throttle curve. Instead of your extremes being 0% or 100%, you can change them to any number until the servo stops buzzing. Increase 0% to take some travel out of 1st gear. Decrease 100% to take some travel out of 3rd gear. Make sure if you make an adjustment this way, that all 5 points on the throttle curve have the same value. For example, if you need to take some travel out of the servo in 1st gear, change all 5 points on the throttle curve to something larger than 0%. Larger numbers will reduce the throw.

When you're finished with programming the radio in this way, you should now have control over the shift servo with SW-3. I hope this helps you out and isn't to confusing to understand. If you need more help, just ask. I'll do my best.