2004 Dodge Ram 3500 Pickup Owner Manual Diesel - Page 356

356 MAINTAINING YOUR VEHICLE • If a bearing assembly is accidentally separated when servicing the brake rotors, it should be replaced. Rear Wheel Bearings Clean and repack when brake linings are replaced or rotors resurfaced. Selection Of Lubricating Grease The National Lubricating Grease Institute (NLGI) has developed a symbol (Certification Mark) to aid the vehicle owner in the proper selection of grease for the lubrication of wheel bearings and chassis components. This symbol (an example shown below) is located on the grease container and identifies the application and quality of the grease. There are two groups identified: those for wheel bearings (Letter "G") and those for chassis (Letter "L") lubrication. Performance categories within these groups result in dual letter designations for each group. The letter designations shown in the example are the highest quality level available and when combined as shown can be used for both wheel bearing and chassis lubrication. Use only those greases that have the NLGI symbol on the container along with the proper quality level for your application.