TC Remanufacturing BM39 Automatic Transmission Torque Converter

Overview of TC Remanufacturing BM39 Torque Converter

The TC Remanufacturing BM39 automatic transmission torque converter is engineered for select BMW and Land Rover models, including the 540i, 740i, 740iL, 840Ci, Range Rover, and X5. Designed with a captive clutch and medium stall, this torque converter ensures reliable power transfer and smooth shifting performance.

• Bolt Circle Diameter: 10.500 inches
• Converter Diameter: 11.000 inches
• Converter Type: Captive clutch
• Hub Type: Slotted with 27 splines
• Mounting Thread Size: 10mm x 1.5
• Mounting Type: 4 pads
• Pilot Diameter: 1.257 inches
• Compatible Converter Codes: 157-100, d21, f38, f39, l31
• Ring Gear: Not included
• Stall Speed: Medium

Technical Details and Compatibility

The BM39 torque converter from TC Remanufacturing is specifically designed to meet the requirements of automatic transmissions in BMW 540i, 740i, 740iL, and 840Ci models, as well as Land Rover Range Rover and X5 vehicles. Its captive clutch design improves torque transfer efficiency and reduces slippage, while the slotted hub with 27 splines ensures secure engagement with the transmission input shaft. The 10.500-inch bolt circle and 4-pad mounting type provide a precise fit for the intended applications. The medium stall speed balances performance and drivability for these luxury vehicles.

Applications and Problem Resolution

This torque converter is used in automatic transmissions to transfer engine power smoothly to the transmission, enabling efficient acceleration and gear changes. It is suitable for addressing issues such as:

• Transmission shudder or vibration during acceleration
• Delayed or harsh shifting in automatic transmissions
• Overheating caused by inefficient torque converter operation
• Reduced fuel efficiency due to torque converter slippage
• Failure of the original torque converter clutch mechanism

Installation Notes and Tips

When installing the BM39 torque converter, ensure the following:

• Verify compatibility with your specific BMW or Land Rover model and transmission code.
• Inspect the transmission input shaft and pump for wear or damage before installation.
• Use the correct mounting thread size (10mm x 1.5) and torque specifications for secure attachment.
• Confirm the slotted hub and spline count (27) match the transmission input shaft.
• Flush the transmission fluid and replace with manufacturer-recommended fluid after installation.

Quality Assurance and Warranty

TC Remanufacturing torque converters undergo rigorous remanufacturing processes to meet OEM specifications. Each BM39 unit is tested for balance, clutch operation, and durability to ensure reliable performance. While specific warranty details may vary, TC Remanufacturing typically offers a limited warranty covering defects in materials and workmanship. Consult product documentation for exact warranty terms.