i've been reading and hearing alot about the C6. most of the trucks i've read about have one. is it that much better? i know it doesn't have overdrive. does that make difference in performance vs. fuel economy? both my broncos have the overdrive button in the end of the shifter handle. i've already rebuilt one of them and it hurt the wallet. my other truck is still going with over 162k and eventually its going so if the C6 is an upgrade i want to know. its a 95 and lift kit is planned.