Newmar Corporation (Newmar) is recalling certain model year 2015-2016 King Aire and Essex vehicles manufactured from March 13, 2014, and May 13, 2015, and model year 2016 Mountain Aire vehicles manufactured from March 17, 2015, through April 17, 2015. The affected vehicles, built on a Spartan Chassis, have fasteners that attach the stay rod (v-rod) to the rear drive axle that may not have been installed with thread locker or tightened in the correct sequence.