Description
1978-1988 GM A/G-Body LS swap 4L60//4L65/4L70/4L80/TH400/2004R/T56/T56 Magnum Transmission Crossmember
This crossmember is one part of the Hooker BlackHeart LS swap system for the 1978-1988 GM A/G-Body for an easy bolt-in engine swap. The modular design of this crossmember supports the following transmissions: 4L60//4L65/4L70/4L80/TH400/2004R/T56/T56 Magnum Transmissions (some transmissions require an optional transmission adapter - sold separately). This is a revised design and is fully interchangeable with part number 12644HKR.
Features:
The LS Swap Crossmember for the GM G-Body has some very minor design updates & has been superseded from 12644HKR to part number 12644HKR-1
Facilitates installation of a 4L60/4L65/4L70/4L80/TH400/2004R/T56/T56 behind an LS engine in 78-88 GM A/G Body applications (may require add-on bracket, see installation notes)
Designed using CAD modeling/FEA analysis for optimal fitment, strength, weight, safety and appearance
Welded steel construction
Provides an optimized engine/transmission inclination angle that is critical to obtaining suitable U-joint working angles, when installed with Hooker 12643HKR engine mounts
Designed in conjunction with other Hooker BlackHeart GM A/G-Body engine swap brackets to provide bolt-in installation of Hooker LS swap manifolds, headers and exhaust systems for this application
Provides the highest clearance available for up to 3" dual exhaust system routing
Specs:
Brand: Hooker BlackHeart
Color: Black
Emission Code: 5
Finish: Black Powder coated
Material: Steel
Motor Type: GM LS
Product Type: Crossmember
Transmission: 200R4
Transmission: 4L60E
Transmission: 4L65E
Transmission: 4L70E
Transmission: 4L75E
Transmission: 4L80E
Transmission: 4L85E
Transmission: T56 GM
Transmission: T56 Magnum GM
Transmission: TH400
Transmission Type: 4L60/4L65/4L70/4L80/TH400/2004R/T56/T56 Magnum
Type of Component: Crossmember
Warning: California Proposition 65
Installation Notes:
Revised Design - Interchangeable with 12644HKR.
Integral component of the complete Hooker BlackHeart swap system for this application. Component features unique geometry that is not compatible for use with any other brand of engine mounting components. 4L60/4L65/4L70 applications require add on bracket P/N 12655HKR. 4L80 applications require add-on bracket P/N 12656HKR. For applications that were NOT originally equipped with a 200-4R transmission, crossmember adapter P/N 12647HKR is required. Crossmember fitment has not been validated for El Camino applications.
*NOT COMPATIBLE WITH TREMEC TR6060 TRANSMISSIONS.
TH350 Transmissions can reuse the factory transmission crossmember, but the slots in the center of the crossmember will need to be elongated in the forward direction.
Product Notes:
Revised Design - Interchangeable with 12644HKR.
