well i have the a11 code i am going to try to change the gear ratio to a taller gear because i am pulling a 6000 lb trailor and want to give my old truck a break it has 118000 miles on it but all of my towing is on flat ground i have always have fords i do belive that the t-100 is a lot better truck but want a little more power with out haveing to run so hard so i would like to have your ideas on gear ratio change and also thank you for your response <img src="/forums/images/graemlins/cheers.gif" alt="" />