Mack Trucks is recalling certain model year 2012-2015 Granite, Pinnacle, TerraPro and Titan trucks manufactured from Sept. 1, 2011, through April 30, 2014. The company is also recalling 2015 LR trucks manufactured during the same period.
The cap nut that retains the interaxle driveshaft yoke to the rear axle input shaft may loosen on affected trucks. If the cap falls off, the yoke can separate from the axle input shaft and allow the drive shaft to disconnect, increasing the risk of a crash. 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. The recall is expected to begin April 15. Owners may contact Mack customer service at 610-709-2132 with recall number SC0399.