TC Remanufacturing B81NS Automatic Transmission Torque Converter

Overview of TC Remanufacturing B81NS Torque Converter

The TC Remanufacturing B81NS automatic transmission torque converter is engineered for reliable performance in select Chevrolet, GMC, Hummer, and Rolls-Royce vehicles. Designed with precise specifications, this lock-up torque converter supports smooth power transfer and efficient transmission operation.

• Bolt Circle Diameter: 11.500 inches
• Converter Diameter: 13.750 inches
• Lock-up Converter Type for improved efficiency
• Hub Type: Milled flats with 2.050 inch hub height
• Mounting Type: 6 pads for secure installation
• Pilot Diameter: 1.703 inches
• Spline Count: 30 splines
• Low stall speed for optimized torque delivery
• Compatible with multiple converter codes including 24202989 and 24210827

Technical Details and Compatibility

The B81NS torque converter from TC Remanufacturing is designed to meet the exacting standards required for automatic transmissions in heavy-duty and performance vehicles. Its 13.750-inch diameter and 11.500-inch bolt circle ensure proper fitment and balance. The lock-up feature enhances fuel efficiency by reducing slippage during highway cruising. The milled flats hub with a 2.050-inch height and 30 spline count provide a secure connection to the transmission input shaft. This torque converter is compatible with Chevrolet and GMC trucks such as the Silverado 1500 HD, Sierra 2500 HD Classic, and Suburban 2500, as well as Hummer H1 and Rolls-Royce Corniche models.

Applications and Problem Resolution

This torque converter is suitable for use in the following vehicles:

• Chevrolet Silverado 2500 HD and 3500 Classic
• GMC Sierra 1500 HD and 3500 Classic
• Hummer H1
• Rolls-Royce Corniche and Park Ward
• Chevrolet Express 2500 and 3500

It addresses common transmission issues such as:

• Transmission slipping or shuddering during acceleration
• Overheating caused by inefficient torque converter lock-up
• Low stall speed affecting vehicle responsiveness
• Excessive transmission fluid contamination due to converter failure
• Noise or vibration related to worn or damaged torque converters

Installation Notes and Tips

Proper installation of the B81NS torque converter is critical for optimal transmission performance. Ensure the torque converter is fully seated on the transmission input shaft and that the mounting pads align correctly with the flexplate. Verify the pilot diameter of 1.703 inches matches the crankshaft pilot to avoid misalignment. Use manufacturer-recommended transmission fluid and follow torque specifications for all bolts. It is advisable to inspect the flexplate and transmission seals during installation to prevent future leaks or damage.

Quality Assurance and Warranty

TC Remanufacturing provides this torque converter with a focus on durability and precision engineering. Each unit undergoes rigorous testing to meet OEM standards. While specific warranty details should be confirmed at the point of purchase, TC Remanufacturing products typically include coverage against defects in materials and workmanship to ensure long-term reliability in Chevrolet, GMC, Hummer, and Rolls-Royce applications.