SUTPHEN HAS NOTIFIED NHTSA ABOUT A DEFECT IN CERTAIN MODEL YEAR 2004 THROUGH 2010 SPH MODEL FIRE TRUCKS MANUFACTURED BETWEEN JANUARY 2004 AND JANUARY 2010, EQUIPPED WITH SERIES 60 DETROIT DIESEL OR C-13 CATERPILLAR ENGINES. PRE 2007, THE DETROIT DIESEL ENGINES WERE MOUNTED LOW IN THE FRAME WHICH CAUSES VIBRATION IN THE DRIVELINE. POST 2007, A NEW SUSPENSION AND FRAME DESIGN CAUSED THE DRIVELINE ANGLES OF THE DETROIT DIESEL AND CATERPILLAR ENGINES TO BE SLIGHTLY OUT OF ALIGNMENT.