Mack · Canada · High
Mack Mru, Leu +4 more: Powertrain
Affects Mack Mru, Leu, Gu, Chu, TD, Cxu · 2012–2015 — about 1K vehicles.
The hazard
On certain vehicles, the cap nut that retains the interaxle driveshaft yoke to the rear axle input shaft may prematurely loosen. If the nut were to loosen and come off, the yoke could separate from the axle input shaft and cause the drive shaft to disconnect. A disconnected drive shaft would result in a loss of motive power, and create a road hazard, both of which could increase the risk of a crash causing injury and/or damage to property. Correction: Dealers will replace the cap nut, and inspect the threads on the input shaft. If the threads are damaged, the input shaft will be replaced.
What to do
Contact your dealer; the remedy details were not included in the filing.