TC Remanufacturing HO21 Automatic Transmission Torque Converter

Overview of TC Remanufacturing HO21 Torque Converter

The TC Remanufacturing HO21 automatic transmission torque converter is engineered for select Acura and Honda models, including the CL, MDX, Odyssey, Pilot, RLX, and TL. Designed with precise specifications, this lock-up converter supports smooth power transfer and reliable transmission performance.

• Compatible with Acura and Honda CL, MDX, Odyssey, Pilot, RLX, and TL models
• Lock-up converter type for improved efficiency
• 10.875-inch converter diameter with 11.250-inch bolt circle
• 38 spline pump drive hub type and 22 spline count
• Mount ring with 8 holes, 6mm x 1.0 mounting thread size
• Includes ring gear with 121 teeth for proper engagement
• Medium stall speed for balanced performance

Technical Specifications and Features

The HO21 torque converter features a 10.875-inch diameter and an 11.250-inch bolt circle, ensuring compatibility with specific transmission assemblies. Its lock-up design enhances fuel efficiency by reducing slippage during highway driving. The 38 spline pump drive hub and 22 spline count provide secure connection to the transmission pump, while the mounting ring with 8 holes and 6mm x 1.0 thread size allows for precise installation. The included ring gear with 121 teeth supports proper starter engagement. A medium stall speed balances torque multiplication and drivability for everyday use.

Applications and Common Issues Addressed

• Replacement for worn or damaged torque converters in Acura CL, MDX, Odyssey, Pilot, RLX, and TL
• Resolves slipping or shuddering during acceleration
• Addresses overheating issues caused by inefficient torque converters
• Improves lock-up clutch engagement for better fuel economy
• Eliminates abnormal noises related to faulty ring gear or splines

Installation Notes and Tips

When installing the HO21 torque converter, ensure the mounting ring with 8 holes aligns correctly with the transmission housing. Verify the 6mm x 1.0 mounting thread size matches the vehicle’s specifications. Properly seat the 38 spline pump drive hub to avoid transmission pump damage. It is recommended to inspect the ring gear teeth for wear and confirm the pilot diameter of 0.945 inches fits securely. Use manufacturer torque specifications for all bolts to maintain secure installation.

Quality Assurance and Warranty

TC Remanufacturing provides this HO21 torque converter with strict quality control to meet OEM standards. Each unit undergoes thorough inspection to ensure spline integrity, ring gear condition, and lock-up functionality. While specific warranty details should be confirmed at purchase, TC Remanufacturing typically offers coverage against defects in materials and workmanship to support long-term reliability.