TC Remanufacturing HD1211 Automatic Transmission Torque Converter

Heavy Duty Torque Converter for GM HD Trucks

The TC Remanufacturing HD1211 is a heavy duty automatic transmission torque converter built for GM diesel and gas heavy-duty truck applications that use a 13.500-inch lock-up design. It features a billet steel cover, milled flats hub, 6-pad mounting, and a 1900-2100 stall range for controlled engagement in demanding towing and hauling use.

Key Features

• Part number: HD1211
• 13.500-inch converter diameter with 11.500-inch bolt circle
• Lock-up torque converter design
• Billet steel cover for added strength
• Heavy duty construction
• Milled flats hub
• 6-pad mounting with 10mm x 1.5mm threads
• 25-spline configuration
• 1900-2100 stall speed
• Converter codes: 211, 29530318, 29538348, 29538529, 29541293, 29543003, 29543017, Green or Yellow Sticker

Detailed Description

TC Remanufacturing HD1211 is an automatic transmission torque converter for Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, GMC Sierra 3500 HD, and related Classic and H1 applications listed below. The lock-up design helps maintain efficient drivability while the heavy duty billet steel cover and 6-pad mounting layout support demanding service in GM HD truck platforms. This part number is commonly searched as a replacement torque converter for 2001-2019 Chevrolet Silverado 2500 HD, 2007-2019 Chevrolet Silverado 3500 HD, and 2001-2014 GMC Sierra 2500 HD applications.

This part cross-references no additional part numbers beyond the listed converter codes for the same application.

What It Helps Address

• Torque converter shudder during lock-up operation
• Slipping or inconsistent coupling under load
• Excessive stall behavior affecting launch feel
• Wear-related issues in high-mileage GM HD truck transmissions
• Replacement needs for a damaged or mismatched converter code

Installation Notes and Fitment

• Fits 2001-2019 Chevrolet Silverado 2500 HD, N/A
• Fits 2007-2019 Chevrolet Silverado 3500 HD, N/A
• Fits 2001-2014 GMC Sierra 2500 HD, N/A
• Fits 2007-2014 GMC Sierra 3500 HD, N/A
• Fits 2007 Chevrolet Silverado 2500 HD Classic, N/A
• Fits 2007 Chevrolet Silverado 3500 Classic, N/A
• Fits 2007 GMC Sierra 2500 HD Classic, N/A
• Fits 2007 GMC Sierra 3500 Classic, N/A
• Fits 2004-2006 Chevrolet Silverado 3500, N/A
• Fits 2001 Chevrolet Silverado 3500, N/A
• Fits 2001-2006 GMC Sierra 3500, N/A
• Fits 2006 Hummer H1, N/A
• Fits 2003 Chevrolet Silverado 3500, N/A; Fitment note: built with heavy duty mounting ring style billet

Verify converter code, spline count, pilot diameter, bolt circle, and mounting style before installation. Confirm transmission application and match the existing unit’s identification codes, including green or yellow sticker references where applicable. Chevrolet Silverado 2500 HD and GMC Sierra 2500 HD owners should compare the original converter specifications to ensure proper fitment.

Quality Assurance

TC Remanufacturing supplies this HD1211 torque converter with heavy duty construction and application-specific dimensions for GM HD truck fitment. The billet steel cover, lock-up design, and code-based identification support accurate replacement selection for Chevrolet Silverado and GMC Sierra heavy-duty platforms.