Here is one that is new I operate an 07 Mack Putz pump and driving down the road it gets so loud I cant even here the signals...lol anyway did my job took it to mack and found out the turbo is almost gone what caused this was a $ .80 cent clamp it broke and caused the exhaust pipe to rattle then split which in turn caused low or no back pressure which toasted the bearings in the turbo and well warranty...... The good news warranty the bad down for a few days