Question, why do most of your fleets still consist of older 378/379 but they're selling off newer 388's on black and chrome sales.com?? had problems with emissions on those 08 trucks??
If you look on the used market there is an inordinate amount of 08's for sale with low mileage. Most companies got rid of them before there normal trade cycle due to issues concerning that series of emissions updates. They for the most part where troublesome at best.