I got an X3 tuned by rogue performance for my '05 ranger. I got an economy tune downloaded right now, and it drives so much smoother. However, when I go into my tunes and do the "adjust options" feature before applying my tune, i see that I can adjust my tire size and axle ratio. My truck has 4.10 gears stock, but the 4.10 selection box in the tuner is not checked, but "stock" is checked. So should I change this to 4.10? I changed the tire size already to my 33x12.5 tires.

 

Did you tell Fred what size tires and gears you had? If you did, I can almost guarantee he programmed that into your custom tune. I just got custom tunes for my 250 and I noticed the same thing.. I left it alone because I know I told them the information they needed.

 

Talked to Fred today. You were correct, he set 4.10 and 33' tires as stock, so I should not adjust anything, and leave it at stock.