Mack FDM: Powertrain

Affects Mack FDM · 1989–1991 — about 14 vehicles.

The hazard

NOTE: FRONT DISCHARGE MIXER CHASSIS. THE PILLOW BLOCKS SUPPORTING THE FRONT DRIVING AXLE DRIVESHAFT ARE OF INSUFFICIENT STRENGTH AND COULD FAIL. THIS COULD ALLOW THE DRIVELINE (JACKSHAFT) TO DROP DOWN ONTO THE ROADWAY AND CREATE A SAFETY HAZARD TO OTHER HIGHWAY USERS. CORRECTION: THICKER PILLOW BLOCKS AND SUPPORTING U-BOLTS WILL BE INSTALLED ON AFFECTED VEHICLES.

What to do

Contact your dealer; the remedy details were not included in the filing.

Critical — crash/injury risk now High — injury risk; see remedy Moderate — fix at next service Low — minor / informational