Thanks Jay-H but I done figured it out since January,
. These electronic boxes, Speedo Healer, Yellerbox etc. really work very well. It is possible to change gearing, tires etc. and custom program the unit in a few minutes. Auto transmissions benefit greatly as the shift points are back where they belong. You can run winter tires, summer tires and in a few minutes change your program. It took me about 30 minutes to install including the RTV and the Radio Shack box. Then two test drives to dial it in. I would not want to do it every week but if you seasonally change tires or go to a special off road tires for an event, this is the e-ticket.