Axle differential kits designed for Class 7 and Class 8 trucks offer a collection of components necessary for rebuilding or servicing the differential. These kits often include items such as gears, bearings, seals, and other hardware, ensuring compatibility with various truck models. These kits help maintain the differential’s function by ensuring smooth torque distribution and proper power delivery to the wheels. They are useful for both routine maintenance and more extensive repairs, helping to preserve the truck's overall drivetrain efficiency.