2007 Chrysler Aspen Owner's Manual - Page 392

392 MAINTAINING YOUR VEHICLE Axles Refer to Fluids, Lubricants and Genuine Parts for correct fluid type. The manufacturer does not recommend regularly scheduled oil changes for axles in vehicles whose operation is classified as normal truck service. NOTE: The presence of water in the gear lubricant will result in corrosion and possible failure of differential components. Operation of the vehicle in water, as may be encountered in some off-highway types of service, will require draining and refilling the axle to avoid damage. Rear Axle Rear Axle fluid levels should be 1/4 (6.4 mm) +/- 1/4" below the fill hole for 8 1/4 , and 9 1/4 axles. Front Axle Front Axle fluid level should be 1/4" (6.4 mm) below the level of the fill hole. 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 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