I don't understand what you'd want to do with "correcting transmission shift points after re-gearing."What is anyone going to do to correct transmission shift points after re-gearing? I've looked at several handheld programmers but the only thing that I've seen they have to do with gearing is recalibrating the speedometer afterwards.
I agree with the question here - If you regeared and adjusted based on tire size - Transmission shift points are tied to the RPM - If you have a performance expectation - i.e. harder launches - towing etc that would want to hold a specfiic gear longer - adjusting may make sense otherwise that is least of issues as you increase gearing / tire size and weight.I don't understand what you'd want to do with "correcting transmission shift points after re-gearing."
Regearing should/will make the larger tires performance similar to the stock tires. All that's needed after regearing is to adjust the speedo/odo which is done by using an aftermarket product like the Tazer, etc.