Look at my album, my gryphon is a monotone, no color except the black lcd screen and backlight leds. being that you got it used, I would guess that you have the monotone gryphon. Did you make sure it was setup for your
The tranny tune is a tune that just modifies the transmission. It makes it shift better which also makes it last longer because there is less wear and tear on it.
Go
here and download the manual for your Gryphon and it will explain a lot better on what you need to do to install the Gryphon in your truck. also you can download Pegasus there.
The biggest things to worry about is to plug the Gryphon in with the truck's key in the on position, but without the engine running. The Gryphon will initialize and it will then display your hex code. it should stick around until you hit a button so write it down then send it in if you want custom tunes.
After it goes through that it will ask if you agree to a warning of some sort, then it should take you to the main screen with 4 parts, each part is customizable to display a different thing such as cylinder head temperature, intake air temperature, what gear you are in, miles per gallon instant or average, and a number of other things.
To tune it you should hit the menu button, go to the performance settings menu, then pick your tune you want to use. Do Not customize the tune for the first time you program it, but you can in the future if you don't like a few things, or you change your tire size or anything like that.
let the tune load, once you are back to the main screen you can then start the truck and enjoy the tune.

Any other questions feel free to ask, like they say, the only dumb question is the one that isnt asked.