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SAE 80W-90 Premium Rear Axle Lubricant by Motorcraft is the recommended choice for the rear differential in a 2003 Chevy Tahoe. The rear differential is crucial for redirecting power to the wheels at a right angle, ensuring smooth operation. Neglecting to change the differential oil is a common oversight in truck maintenance, as it is often overlooked due to its location at the rear of the vehicle. Regularly changing this oil, every 30,000 to 50,000 miles, is essential to prevent potential issues that can hinder your vehicle's performance over time.
The vehicle requires rear differential fluid that has a high viscosity and a weight exceeding 80.