CERTAIN DANA DRIVE AXLE HOUSINGS MANUFACTURED BETWEEN NOVEMBER 2006 AND FEBRUARY 6, 2007, MODEL NUMBERS LISTED ABOVE, INSTALLED AS ORIGINAL EQUIPMENT ON CERTAIN HEAVY DUTY TRUCKS. MIS-MARKED STEEL WAS USED DURING PRODUCTION. THE STEEL COIL WAS MARKED AS 7/16″ (11 MM), WHEN IT WAS IN FACT 3/8″ (9MM). OVER TIME, THE OUT OF SPECIFICATION STEEL COULD RESULT IN A FATIGUE FAILURE OF THE AXLE HOUSING, MOST LIKELY AT THE BRAKE FLANGE. IF UNATTENDED, THE AXLE MAY LOCK UP OR THE END OF THE AXLE COULD COME OFF.