Hooker BlackHeart Transmission Crossmember

1998-2002 GM F-body T56/T56 Magnum/4L60-4L70*/4L80-4L85*/TH400*/2004R* Transmission Crossmember

Part # 71222001HKR Be the first to write a review
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Vehicle emissions regulations are not applicable to this item.

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Hooker BlackHeart announces the release of two new transmission crossmembers for GM 4th-gen F-body vehicles. Each is designed for use as part of Hooker's LS/T56 swap for this vehicle platform, or as a direct stand-alone component to accomplish a non-OE transmission swap into a 4th-gen F-body behind an LS engine. . Optional brackets and spacers are available to accommodate the installation of a 4L60E, 4L80E, 2004R or TH400 transmission into an LS engine equipped 4th-gen and/or for providing a divorced torque arm mount for use with any of these transmissions. Also available is the Floor Brace and Body Notch Panel, CAD designed for direct compatibility with Hooker and other brand 4th-Gen F-Body dual exhaust systems.


  • CAD designed for optimum fitment, strength and ease of installation
  • Provides for installation of a 4th-gen T-56 or aftermarket T56 Magnum transmission in behind an LS engine in any 1993-2002 GM F-body vehicle
  • Transmission installation coverage can be expanded to include 4L60-4L70, TH400, 2004R or 4L80/4L85 transmissions through the use of available Hooker adapter brackets.
  • Optional Hooker adjustable bolt-on torque arm bracket available to divorce stock torque arm from the stock transmission case mounting
  • Attractive Semi-gloss black powder coat finish

About Hooker BlackHeart

The BlackHeart team utilizes the latest technology and materials to design exhaust systems, engine swap kits, and mufflers for both import and domestic cars and trucks. Hooker BlackHeart is platform-engineered to provide superb performance, aesthetics, and fitment.

Application1993-2002 GM F-Body
Bracket FinishBlack Powerdercoated
Bracket MaterialSteel
Brand Hooker BlackHeart
Emission Code6
Exhaust SeriesHooker BlackHeart
FinishBlack Powdercoated
Motor TypeGM F-body
Product TypeTransmission Crossmember
T56 GM
T56 Magnum GM
Transmission TypeT56/T56 Magnum
Type of ComponentCrossmember
Part Number71222001HKR

Vehicle emissions regulations are not applicable to this item.
Installation requires the use of separately available Hooker BlackHeart transmission adapter kit. 4L80-4L85 installations will require notching/modifications to the body bracing on the driver's side of the transmission tunnel. 4L60E-4L70E Transmissions Require Optional Transmission Adapter 71223003HKR 4L80E-4L85E Transmissions Require Optional Transmission Adapter 71224004HKR TH400/200R4 Transmissions Require Optional Transmission Adapter 12650HKR NOT COMPATIBLE WITH TREMEC TR6060 TRANSMISSIONS.

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    Some parts are not legal for use in California or other states with similar regulations.