I have a loaded 06 auto 3. 73. Westech combo gauge . I have a smarty on the way and cant hardly wait. My question is,As far as the transmission goes,should I leave it alone for now & plan a complete upgrade after warranty expires OR go ahead with some mods to transmission now ? If so which mods? This is a daily driver that will see some use ,as a back-up to our 02 CTD . 18,000 current miles on 06. Thanks Tim