Ok guys need some help here. I went to the options setting to adjust the gear ratio and revs. I am running 4.88's and 40's (actual 39.8). I see the sct only allows for 4.56's. I calculated the revs per mile to be 520. So here is my question, do i set the gears to 4.56 and then 520 rev or do I leave the gears to stock setting and adjust to 520? Originally the truck had 3.73 gears. How do I figure out how close to stock gear ratio my current set up is to what the old set up was. Meaning 4.88 vs. 3.73. I think the tires stock were 275's. How would you all set it up....... just set the revs or change the gear setting too. Let me know please.