TC Remanufacturing B21FLHB Automatic Transmission Torque Converter

Automatic Transmission Torque Converter

TC Remanufacturing B21FLHB is a lock-up automatic transmission torque converter built for GM front-wheel-drive applications that use a 9.500-inch bolt circle, 27-spline hub, and bushing-style hub design. It features a carbon woven friction surface and a 1500-1750 RPM stall range for the listed Buick, Chevrolet, Oldsmobile, Pontiac, and Saturn vehicles.

• Part number: B21FLHB
• Lock-up torque converter with carbon woven friction type
• 10.200-inch converter diameter
• 9.500-inch bolt circle and 0.825 pilot diameter
• 27-spline count with bushing hub type
• 3-pad mounting style
• 1500-1750 RPM stall range
• Converter codes include FLHB, FL, FGHB, FGKB, FLQB, FM, and related OE references

Fitment Details

Compatible with a wide range of GM vehicles, including Fits 2007-2010 Pontiac G6, Fits 2004-2007 Chevrolet Malibu, Fits 2005-2006 Buick LaCrosse, Fits 2002-2006 Buick Rendezvous, Fits 1994-2006 Pontiac Grand Prix, Fits 2000-2005 Chevrolet Impala, and Fits 2006 Saturn Vue with the noted 9.5-inch bolt circle, bushing hub, and FLHB converter code requirements. The B21FLHB also applies to additional Buick, Oldsmobile, and Pontiac platforms listed in the fitment data, including Grand Am, Regal, LeSabre, Century, Bonneville, and more.

This part cross-references OE-style converter codes such as 24212743 and 24222019 for the same application.

Common Uses

• Restoring proper torque transfer in a slipping or worn automatic transmission
• Addressing shudder or inconsistent lock-up operation
• Replacing a converter with incorrect bolt circle, hub type, or spline count
• Correcting drivability issues tied to stall speed mismatch
• Servicing GM front-wheel-drive transmissions that require FLHB-style converter coding

Installation Notes

Verify the converter code, bolt circle, hub style, spline count, pilot diameter, and stall range before installation. Confirm transmission and engine application against the vehicle’s original specifications, especially on 2006 Pontiac G6 and 2006 Saturn Vue applications that call out the 9.5-inch bolt circle and bushing hub configuration. Flush the transmission cooler and inspect related hard parts before installing the new converter.

Quality Assurance

TC Remanufacturing supplies this torque converter as a remanufactured transmission hard part for the listed applications. Match the part number B21FLHB to the vehicle’s required converter code and transmission setup for proper fitment.