Bought Gryphon tuner from a member on here...I intstalled it today...plugged in the level 2 towing tune...when I go to get bigger tires how do I adjust that also how can I adjust line pressure and shift points?

 

When you're getting ready to load a tune, it'll ask something along the lines of "create custom tune?" Choose Yes for this and then you'll have all the many options of things to change including the tire size, shift points, shift firmness, etc.
Hope this helps and enjoy the new tuner!

 

THANKS!!! It does help!! I am completely illiterate to the techno era cars....I am old school....With the towing tune I can feel a little more in the seat of the pants!! I am surprised!!