I knew it was something like that. We have two Freightliner Coronado's at work, both detroit powered, both with Eaton 13spds and BOTH are constantly in the shop - and i mean on a weekly basis they are getting exhaust filters changed, theyve already had to replace the stacks, and the entire exhaust system, its not uncommon to see flames out the stacks on these trucks... The EPA should leave the truck mfg's alone, and start pestering big business and the railroad ... Lets see EMD and GE Comply