The 1984 Mack R Series has 2 NHTSA recall campaigns affecting an estimated 31,153 vehicles. Recall repairs are always free at any authorized dealer. Owners have filed 1 complaint with NHTSA, most often about the power train. Last updated July 5, 2026.
THE ACCELERATOR ROD HOLE CLEARANCE IS NOT ADEQUATE AND CAN CAUSE THE ACCELERATOR LINKAGE TO BIND. CONSEQUENCE OF DEFECT: IF BINDING OCCURS WHILE IN A FULL THROTTLE POSITION, ACCELERATOR…
ENLARGE THE ACCELERATOR ROD HOLE TO ELIMINATE INTERFERENCE WITHIN ACCELERATOR LINKAGE.
IMPROPER STEERING CLAMP BOLTS AND TORQUE APPLIED DURING INSTALLATION. THE BOLT COULD FAIL, ALLOWING THE STEERING YOKE TO BECOME LOOSE.
INSPECTION AND, IF NECESSARY, INSTALLATION OF PROPER STEERING SHAFT CLAMP BOLTS TIGHTENED TO SPECIFICATIONS.
Verbatim reports filed with NHTSA, lightly edited for readability and with personal information removed.
“1984 mack super liner drive shaft broke rupturing the fuel tank. Consumer states that when the drive shaft broke and ruptured the fuel tank it spilled about 50 to 75 gallons of diesel fuel onto the roadway. *kb”
Recall, complaint, and investigation records from official NHTSA datasets (FLAT_RCL, FLAT_CMPL, FLAT_INV), synced weekly. Counts reflect NHTSA records for the 1984 Mack R Series as of July 5, 2026. Complaint narratives are consumer-submitted and unverified. This page contains ads and affiliate links. Full methodology.