My brother just got a 08 LMM and wants to mess with it. I havent done anything to a diesel yet. (been itchin to) I did do a little reading on the diesel place, but didnt look around enough to see if there are anything different you have to do for the 08's. Mostly we are looking for mileage and of course a little power. I am also kinda curious about what can be done with the allison. I have a few buddies that want their tranny messed with.