2012–2016 Mack Granite (gu), 2015–2016 Mack LR, 2012–2015 Mack Pinnacle (chu) and 4 other models Recall: Cap nut that retains the interaxle driveshaft yoke to the rear axle input…
NHTSA campaign 16V099000 · Power Train · filed Feb 19, 2016 · verified Jul 30, 2026
The defect
Mack Trucks, Inc. (Mack) is recalling certain model year 2012-2016 Granite (GU), Pinnacle (CHU, CXU), TerraPro (LEU, MRU), Titan (TD), and LR trucks manufactured from September 1, 2011, through September 8, 2015. The cap nut that retains the interaxle driveshaft yoke to the rear axle input shaft may loosen.
The risk
If he cap nut loosens and falls off, the yoke can separate from the axle input shaft and allow the drive shaft to disconnect, increasing the risk of a crash.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →The fix — what to do
Mack will notify owners, and dealers will replace the cap nut. The input shaft threads will be inspected for damage. Any damaged input shaft will be replaced. These repairs will be performed free of charge. An interim notice was sent to owners on April 25, 2016. The recall began on June 7, 2016. Owners may contact Mack customer service at 1-610-709-2131. Mack's recall campaign number for this recall is SC0399.
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.
Affected vehicles
Related recalls
More Mack Granite (gu) recalls
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- 2020–2021 Mack Granite (gu) — Lower rear pivot cap screws may not be long enough to…
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Other campaigns involving Mack vehicles
Source: NHTSA recall database, campaign 16V099000 (manufacturer number SC0399). Data last verified Jul 30, 2026.