I have a 2006 Kenworth w900 with a Cummins isx15 and a 18 speed behind it. it is a decent truck but does have some flaws it had a create motor put in 2011 when I bought the truck in dec of 2016 the ecm had 250000 miles on it, I just had all four fuel metering and timing actuators changed and a new injector put in it a month ago please call or text with any questions 7405076089 thanks Brice