Chrysler will be contacting owners of certain 2009-2010 Dodge Ram 1500 and 2009-2010 Dodge Dakota trucks about a problem with the rear axle pinion nut. Because of a lack of adhesive, the nut could loosen resulting in the rear axle locking up. If this happens while the vehicle is being driven the driver will experience a loss of control, increasing the chance of an accident. Chrysler will be contacting owners starting in November and dealers will secure the nut by installing a pinion nut retainer. For more information about the problem, owners may contact Chrysler at 1-800-247-9753.