engine went south on a friends 256, sent it to the nearest dealer and the quote to fix it was 25000$. I find this hard to believe.it is a 3.9 cummins, nothing special.to remove and replace would take at most a day.something wrong with this picture or am I out to lunch.hate to stick my nose in other peoples business but this is pretty bad.he has all the toys for this unit so he really needs it to run. there must be a cheaper way to solve this problem.