National R-1561-TV Differential Pinion Pilot Bearing - Rear

National R-1561-TV Differential Pinion Pilot Bearing Overview

The National R-1561-TV differential pinion pilot bearing is engineered for reliable driveline performance in a variety of heavy-duty vehicles. Designed to meet precise bore and diameter specifications, this cylindrical bearing assembly supports smooth differential operation in select Cadillac, Chevrolet, Dodge, Ford, GMC, Hummer, Lincoln, and Ram models.

• Bore diameter: 1.7055 inches (43.32 mm)
• Outside diameter: 2.992 inches (75.997 mm)
• Width: 1.195 inches (30.353 mm)
• Cylindrical outer race design for secure fitment
• Part number: R-1561-TV

Technical Specifications and Design Details

This National differential pinion pilot bearing features a cylindrical bearing assembly type (Ns) that ensures proper alignment and support of the pinion gear within the differential housing. The precise bore size of 1.7055 inches (43.32 mm) and outside diameter of 2.992 inches (75.997 mm) provide a tight, accurate fit to reduce vibration and wear. With a width of 1.195 inches (30.353 mm), this bearing is designed to handle the stresses of heavy-duty applications found in trucks and SUVs.

Compatible Vehicles and Fitment Information

The R-1561-TV bearing is compatible with a wide range of vehicles, including popular models such as Chevrolet Silverado 1500, 2500, and 3500 series, Ford F-150, F-250, and F-350, Ram 1500, 2500, and 3500, as well as Cadillac Escalade, GMC Sierra, Hummer H2, Lincoln Navigator, and more. This bearing is suitable for use in both light and heavy-duty trucks, vans, and SUVs requiring a differential pinion pilot bearing with these exact dimensions.

Common Applications and Problem Resolution

• Eliminates excessive pinion gear play and noise
• Prevents premature wear of differential components
• Reduces vibration and harshness in driveline operation
• Restores proper alignment of the pinion gear shaft
• Supports smooth torque transfer in 4WD and AWD systems

Installation Notes and Tips

Ensure the differential housing and pinion shaft are clean and free of debris before installation. Use appropriate tools to press the bearing into place without damaging the cylindrical outer race. Verify the bearing is fully seated and aligned to avoid misalignment issues. It is recommended to inspect related driveline components during installation for wear or damage.

Quality Assurance and Warranty

National bearings are manufactured to meet industry standards for durability and precision. The R-1561-TV differential pinion pilot bearing undergoes rigorous quality control to ensure consistent performance. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in product reliability.