Hello - I have a 2015 Tahoe with 3.08 rear gears that I am about to have replaced with 4.11s. I've found that H0122 in both the ECM and TCMs are the gear ratios, and have changed them. However, my experience with EFI Live in the past (Gen 3 4-speed stuff) is that when the rear ratios are changed there is a way to recalculate the gear shifts for the new ratio. I did find the one that recalculates if I change tire sizes. Am I missing something here, or will the gear shifts have to be manually changed for the new ratio? I checked around the site and didn't find any tutorials that address rear gear changes, but did find a tutorial for changing the shift points so if nothing else... at any rate, am I missing the conversion calculator? I figure I can also play with the rear tire size to correct the shift tables, then put the correct tire size in with the new rear ratio. Mainly I want to make sure I'm not missing something since this is an unfamiliar system to me.