When should you change the differential fluid in a 2006 ford f-150?

According to the 2006 Ford F-150 owner's manual, the rear axle fluid should be changed every 100,000 miles or 10 years, whichever comes first. Some owners may prefer to change the fluid sooner for better protection, such as every 50,000 miles or 5 years. It's crucial to follow the recommended maintenance schedule to ensure optimal performance and longevity of your vehicle's drivetrain components.