199 F-150 Gryphon Custom Parameters

[1999RedXLT]

Hello All,

I've read the FAQ about custom parameters and I'm not sure I understand completely. I understand that there are some parameters that are specific to the vehicle configuration, like gear ratios and tire sizes. Others are tuneable, like WOT and Rev limit. I further understand that those parameters, or their equivalents, exist in the stock tune. It would seem like the Gryphon would load the stock gear ratios and tire sizes, even if you are doing a custom tune, then you would only have to change them if/when you change the item, like tire sizes. But as I understand it, the Gryphon, when you open the custom parameters screen, loads some default parameter that may or may not represent the configuration of your truck, even if it is stock. So you have to go and set tire size and gear ratio (anything else?) if you load any custom parameters. While that seems suboptimum, it may be due to the architecture of the ECM or Gryphon and I'm OK with it. But when do I have to do that? Only the first time for each level? Every time I change levels? Example - If I have larger tires, and I want to enter that fact in Level 2, I open the screen and do so. Maybe I change some shift points, and other things and after I finish towing, I want to go to Level 3. First, when I go to level 3, are all my custom parameters in Level 2 saved with Level 2 so that they are there the next time I use Level 2? When I load Level 3 and open custom parameters, I'll get the defaults, right? I know I can choose to get parameters from the previous tune, but I don't want them all, just the ones associated with the truck, like tire size. So if I don't want to blow away Bill's good defaults for Level 3 I have to let it load the defaults and change the things that need changing, like tire size, is that right?

Sorry to be so dense, but I'd like to be sure I understand the use and storage of custom parameters.

Thanks,

Al