Originally Posted by
calhoub
14 tundra, have 36's. Gears should be the stock 4.30's.
Needing to calibrate the speedo. Changing the parameters in the speedo tab does nothing. I've changed tire size, gear ratio, from what it should be to absolutely bonkers.... does nothing, literally. 5-6 mph off initially, 5-6 mph off 6 tunes later.. I watched some videos to see just how incorrectly I'm doing this & they showed in the drop down menus a gear and tire size calculator...well, my software doesn't have that option. Now, I may not be a pro tuner, and the last tuner I messed with was Jet back probably 13 years ago, but... I feel like something isn't right here and I must be missing something important.