Bosch made faulty brake calipers, there was a Workhorse recall on those brakes. If the calipers on your new coach weren't replaced, it still can be done for free at any Workhorse Dealer. The 8.1 Vortec, Chevy 496 cubic inch engine is now a obsolete GM engine made that way by GM and the EPA. The EPA claimed in 2009 (the year this engine was discontinued) that this engine could not pass Federal Emissions Standards and GM chose not to meet those standards. IMHO, the 8.1 Chevy engine was the best gas motor ever put into a RV, and I say that having owned both a Ford V-10 and a Chevy 8.1 in RV's.