[Jackpine]

Originally Posted by Justin

K...I'm confused. The build sticker on my truck says I have 3.55's, but if i go in to change the gear setting it said I had 3.31. Which one do I trust?

Justin - Twintips was ALMOST right. You DO want to use the Gear Ratio that is shown on the truck's sticker.

The confusing part is, each and every time you open the Custom Options menu, the software in the Gryphon ignores what's in your tunes or in the Vehicle ID section of your PCM and it loads simple "placeholder" values for Gear Ratio AND Tire Size. This means you HAVE to make sure they are BOTH correct if you go into Custom Options. My GR DOES always happen to be correct - at 3.73, but my TS is not. So, during a tuning session, set your GR and TS to the correct values and then program the PCM.

Now, the NEXT time you decide to program the PCM and use Custom Options, scroll to "Load Previous Settings" immediately! This will retrieve and load the previous values for GR and TS, as well as any other options you changed from default values. It's a quick way to get back to where you were the last time you programmed the PCM. Once you've done that, you can go to any individual option and make further changes. Any changes you make will be part of the Previous Settings file the next time you Reload Previous Settings.

Hope this makes a bit of sense.

- Jack