TC Remanufacturing B21FDQB Automatic Transmission Torque Converter

Automatic Transmission Torque Converter

TC Remanufacturing B21FDQB is an automatic transmission torque converter built for GM front-wheel-drive applications that use a 10.200-inch lock-up converter with a 9.500-inch bolt circle. It is identified by converter codes FD, FDQB, FE, FJ, and OE references 24235591 and 24241866. This B21FDQB torque converter is a direct-fit option for a wide range of Buick, Chevrolet, Oldsmobile, and Pontiac vehicles.

• Lock-up torque converter for automatic transmissions
• 10.200-inch converter diameter
• 9.500-inch bolt circle
• 3-pad mounting type
• 27-spline hub with bushing hub type
• 0.825-inch pilot diameter and 0.950-inch pilot length
• 2095 RPM stall speed
• No ring gear
• Converter codes: 24235591, 24241866, FD, FDQB, FE, FJ

Fitment and application details

Compatible With GM automatic transmission applications across Buick Century, Buick Regal, Chevrolet Impala, Chevrolet Monte Carlo, Pontiac Grand Prix, Pontiac G6, and other listed models. Search terms such as “B21FDQB torque converter for 2000-2005 Chevrolet Impala” or “lock-up torque converter for 2006-2010 Pontiac G6” match the vehicle coverage shown below.

• Fits 2006-2010 Pontiac G6, N/A
• Fits 1994-2005 Buick Century, N/A
• Fits 1982-1992 Buick Century, N/A
• Fits 2000-2005 Chevrolet Impala, N/A
• Fits 1995-2005 Chevrolet Monte Carlo, N/A
• Fits 2004 Buick Park Avenue, N/A
• Fits 2001-2004 Oldsmobile Alero, N/A
• Fits 2000-2004 Oldsmobile Silhouette, N/A
• Fits 1992-1997 Oldsmobile Silhouette, N/A
• Fits 2002-2003 Pontiac Montana, N/A
• Fits 2002 Buick Regal, N/A
• Fits 1991-1997 Buick Regal, N/A
• Fits 1989 Buick Regal, N/A
• Fits 2000-2002 Pontiac Grand Prix, N/A
• Fits 1994-1997 Pontiac Grand Prix, N/A
• Fits 1990-1992 Pontiac Grand Prix, N/A
• Fits 1995-2001 Chevrolet Lumina, N/A
• Fits 1990-1993 Chevrolet Lumina, N/A
• Fits 1990-1999 Chevrolet Cavalier, N/A
• Fits 1999 Oldsmobile Cutlass, N/A
• Fits 1997 Oldsmobile Cutlass, N/A
• Fits 1999 Pontiac Grand Am, N/A
• Fits 1996 Pontiac Grand Am, N/A
• Fits 1987-1994 Pontiac Grand Am, N/A
• Fits 1999 Pontiac Trans Sport, N/A
• Fits 1994-1995 Pontiac Trans Sport, N/A
• Fits 1998 Oldsmobile Achieva, N/A
• Fits 1992-1995 Oldsmobile Achieva, N/A
• Fits 1988-1997 Oldsmobile Cutlass Supreme, N/A
• Fits 1995-1996 Buick Riviera, N/A
• Fits 1982-1996 Oldsmobile Cutlass Ciera, N/A
• Fits 1996 Oldsmobile LSS, N/A
• Fits 1994-1995 Buick Skylark, N/A
• Fits 1990 Buick Skylark, N/A
• Fits 1992-1995 Chevrolet Lumina APV, N/A
• Fits 1990-1994 Chevrolet Corsica, N/A
• Fits 1994 Oldsmobile Cutlass Cruiser, N/A
• Fits 1987-1989 Oldsmobile Cutlass Cruiser, N/A
• Fits 1988-1993 Pontiac LeMans, N/A
• Fits 1988-1991 Oldsmobile Cutlass Calais, N/A
• Fits 1985-1987 Oldsmobile Calais, N/A
• Fits 1982-1987 Oldsmobile Firenza, N/A
• Fits 1986 Buick LeSabre, N/A
• Fits 1986 Oldsmobile Delta 88, N/A
• Fits 1985 Oldsmobile 98, N/A
• Fits 1984-1985 Pontiac J2000 Sunbird, N/A
• Fits 1982-1984 Oldsmobile Omega, N/A
• Fits 1982-1984 Pontiac Phoenix, N/A
• Fits 1982-1983 Pontiac J2000, N/A

What this torque converter helps address

• Shudder or slip during lock-up operation
• Delayed engagement after transmission service
• Incorrect stall characteristics from a worn converter
• Vibration or drivability issues tied to converter wear
• Transmission rebuilds requiring a replacement lock-up converter

Installation notes and tips

Verify the converter diameter, bolt circle, spline count, pilot dimensions, and converter code before installation. The B21FDQB is a 3-pad, 27-spline lock-up converter with a bushing hub, so matching the transmission and engine-side dimensions is critical for proper seating and engagement. For search relevance, this part number is commonly referenced as TC Remanufacturing B21FDQB for Buick Century, Chevrolet Impala, and Pontiac Grand Prix applications.

Quality assurance

TC Remanufacturing identifies this unit by OE-style converter codes and OE reference numbers, supporting accurate application matching for service and rebuild work. Part number B21FDQB is cataloged for direct vehicle lookup across the listed GM applications.