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Trans-dapt Performance Products

Trans-Dapt Performance Frame Rail Adapter Kits 6423 Transmission Mount, LS into GM A/G-Body Car, Transmission Crossmember, Plate, Kit

SKU: TRD6423

Transmission Crossmember Extensions and Brackets
Trans-Dapt Performance Frame Rail Adapter Kits 6423 Transmission Mount, LS into GM A/G-Body Car, Transmission Crossmember, Plate, Kit

Trans-dapt Performance Products

Trans-Dapt Performance Frame Rail Adapter Kits 6423 Transmission Mount, LS into GM A/G-Body Car, Transmission Crossmember, Plate, Kit

SKU: TRD6423

Transmission Crossmember Extensions and Brackets
A$231.29
BACKORDER This item will be special ordered in for you. Contact us prior to purchase if you require an ETA.
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Description

Trans-Dapt Performance frame rail adapter kits acclimate your non-200R4 frame rail extension car for proper installation of transmission and LS engine. These kits alter the crossmember attachment holes on GM A/G-body cars that do not have a THM200R4 frame rail extension on the driver (left) side, allowing you to fasten Trans-Dapt's crossmember to the frame, and in turn have the capability to install a T56, TH400, 4L60, 65, 70, or 4L80E transmission with an LS engine. These adapter brackets are formed from steel and painted black.

Part Type

Transmission Crossmember Extensions and Brackets

Data: v4.2 - Upd: 2026-10-15 09:09:11

Specifications

Product Attributes - Brand
Trans-Dapt Performance Products
Product Attributes - Manufacturer's Part Number
6423
Product Attributes - Part Type
Transmission Crossmember Extensions and Brackets
Product Attributes - Product Line
Trans-Dapt Performance Frame Rail Adapter Kits
Product Attributes - UPC
086923064237
Product Attributes - Bracket Attachment Style
Bolt-on
Product Attributes - Bracket Material
Steel
Product Attributes - Bracket Color
Black
Product Attributes - Mounting Hardware Included
Yes
Product Attributes - Quantity
Sold as a kit.

Reference Information

Brand Name/s Trans-dapt Performance Products
StreetFX SKU trd6423
SFX Item ID 5017324
Supplier Item Code 5017324
Manufacturer SKU 6423
Manufacturer UPC 86923064237

Compatibility

Application Data
  • UniversalNo
    MakeBUICK
    ModelCENTURY
    Beginning Year1978
    Ending Year1981
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
  • UniversalNo
    MakeBUICK
    ModelREGAL
    Beginning Year1978
    Ending Year1987
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
  • UniversalNo
    MakeCHEVROLET
    ModelEL CAMINO
    Beginning Year1978
    Ending Year1987
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
  • UniversalNo
    MakeCHEVROLET
    ModelMALIBU
    Beginning Year1978
    Ending Year1983
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
  • UniversalNo
    MakeCHEVROLET
    ModelMONTE CARLO
    Beginning Year1978
    Ending Year1988
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
  • UniversalNo
    MakeGMC
    ModelCABALLERO
    Beginning Year1978
    Ending Year1987
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
  • UniversalNo
    MakeOLDSMOBILE
    ModelCUTLASS
    Beginning Year1978
    Ending Year1981
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
  • UniversalNo
    MakeOLDSMOBILE
    ModelCUTLASS SUPREME
    Beginning Year1978
    Ending Year1987
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
  • UniversalNo
    MakeOLDSMOBILE
    ModelCUTLASS SUPREME
    Beginning Year1981
    Ending Year1981
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
  • UniversalNo
    MakePONTIAC
    ModelBONNEVILLE
    Beginning Year1982
    Ending Year1986
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
  • UniversalNo
    MakePONTIAC
    ModelGRAND PRIX
    Beginning Year1981
    Ending Year1987
    Engine FamilyChevy small block Gen III/IV (LS-based engines)

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