{"product_id":"transxmbr-21","title":"Transmission Crossmember G-Body LS Or Lt Swap Fits 1978-1988 GM A, G-Body 4L60, 4L80, 6L80, 8L90, 10L80, Th400, 2004R, Tkx, T56, T56 Magnum, Etc. Transmission Crossmember Hooker BlackHeart","description":"\u003cp\u003e\u003cb\u003ePart #:\u003c\/b\u003e 12644HKR-1\u003c\/p\u003e\u003cp\u003eMaking it possible to fit almost any GM transmission into your G-Body alongside an LS or LT, this updated transmission crossmember should be used with an aftermarket urethane transmission mount such as the Hooker Blackheart 71223029HKR or 71223030HKR or equivalent.Due to the unique design geometry of this transmission crossmember, attempts to install it with headers and\/or engine mounting plates\/brackets other than those developed by HOOKER for this application will more than likely not be successful.  When used with the related Hooker 12643HKR or BHS5179 engine mounting bracket kit, this CAD designed transmission crossmember will replicate the stock small block Chevy engine\/transmission inclination angle and eliminate or minimize the need to adjust the rear pinion angle in stock to moderately lowered chassis applications.Depending on the transmission, the following part numbers will be necessary:No additional adapter needed for TH400\/200R4\/T-56\/Magnum. 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.12655HKR - 4L60\/65\/70\/75 Transmission Adapter12656HKR - 4L80\/85 Transmission AdapterBHS5181 - 10L80\/10L90 Car Transmission Adapter - must be used with BHS5182 (for G-Body)BHS5182 - 6L80\/90, 8L45\/80\/90, 10L80\/90 Transmission AdapterBHS5183 - Tremec TKX 5-Speed Transmission AdapterThis LS and LT Swap Crossmember for the GM G-Body has some very minor design updates \u0026amp; has been updated from 12644HKR to part number 12644HKR-1Facilitates 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 appearanceWelded steel constructionProvides an optimized engine\/transmission inclination angle that is critical to obtaining suitable U-joint working angles, when installed with Hooker 12643HKR engine mountsDesigned 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 applicationProvides the highest clearance available for up to 3 Inch dual exhaust system routingDetails:Color: BlackEmission Code: 5Engine: GM Gen III\/IV (LS)Finish: Black PowdercoatedMaterial: SteelMotor Type: GM LSProduct Type: Transmission CrossmemberTransmission: 200R4, 4L60E, 4L65E, 4L70E, 4L75E, 4L80E, 4L85E, T56 GM, T56 Magnum GM, TH400Transmission Type: 4L60\/4L65\/4L70\/4L80\/TH400\/2004R\/T56\/T56 MagnumType of Component: CrossmemberWarning: California Proposition 65\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eThis LS and LT Swap Crossmember for the GM G-Body has some very minor design updates \u0026amp; has been updated from 12644HKR to part number 12644HKR-1\u003c\/li\u003e\n\u003cli\u003eHigh Arch Exhaust Passages Provide Maximum Ground Clearance\u003c\/li\u003e\n\u003cli\u003eFacilitates 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)\u003c\/li\u003e\n\u003cli\u003eReplicates Drivetrain Height For Compatibility\u003c\/li\u003e\n\u003cli\u003eDesigned using CAD modeling\/FEA analysis for optimal fitment, strength, weight, safety and appearance\u003c\/li\u003e\n\u003cli\u003eHigh Strength\/Low Alloy Steel\u003c\/li\u003e\n\u003cli\u003eWelded steel construction\u003c\/li\u003e\n\u003cli\u003eBalances Strength\/Weight\/Cost\u003c\/li\u003e\n\u003cli\u003eProvides an optimized engine\/transmission inclination angle that is critical to obtaining suitable U-joint working angles, when installed with Hooker 12643HKR engine mounts\u003c\/li\u003e\n\u003cli\u003eCorrosion Resistant\u003c\/li\u003e\n\u003cli\u003eDesigned 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\u003c\/li\u003e\n\u003cli\u003eLimited Lifetime Warranty\u003c\/li\u003e\n\u003cli\u003eProvides the highest clearance available for up to 3\" dual exhaust system routing\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eBlackheart Transmission Crossmember |  1978 - 1988 GM A\/G-Body Swap 4L60\/\/4L65\/4L70\/4L80\/TH400\/2004R\/T56\/T56 Magnum Transmission |  Black Powdercoated |  Steel\u003c\/p\u003e\u003cp\u003eThis product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.\u003c\/p\u003e","brand":"Hooker","offers":[{"title":"Default Title","offer_id":51827689881912,"sku":"H00I 12644HKR-1","price":617.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/378716985.webp?v=1778804518","url":"https:\/\/store.motormia.co\/products\/transxmbr-21","provider":"MOTORMIA","version":"1.0","type":"link"}