Photo of frame adapter kit for non-200R4 transmission G-Body cars. Photo of Non-200R4 transmission model G-body cars, in box. This Product is MADE IN THE USA!

Non-200R4 Framerail Extension Adapter Kit; '78-88 GM A/G-Body (Use with TD#6422)

Framerail Adapter Kit For 1978-88 GM A/G-Body cars without Driver (left) Side 200R4 Frame Extension; For Use with Trans-Dapt #6422 LS in G-Body Transmission Crossmember


Trans-Dapt Performance Products has been manufacturing products to assist gearheads install an LS engine into a wide variety of classic GM cars and trucks since 2001, when they released universal-use engine adapter plates. Since this early start in the LS engine swap market, Trans-Dapt has dramatically expanded its LS engine swap product line to include precise fitting, application specific engine and transmission mounting components.

This steel frame rail adapter kit alters the crossmember attachment holes on 1978-87 A/G-body cars that do not have a THM200R4 frame rail extension on the Driver (left) side. The adapter allows you fasten Trans-Dapt's 6422 LS into 1978-88 GM A-Body and G-Body transmission crossmember to the frame. Trans-Dapt's #6422 crossmember is for installing a T56, TH400, 4L60, 65, 70 or 4L80E transmission with an LS engine in 1978-81 GM A-Body, or 1982-88 GM G-Body cars.

Product Specifications

[PLEASE REVIEW THE FOLLOWING PRODUCT ATTRIBUTES & VEHICLE APPLICATION FOOTNOTES SPECIFIC TO YOUR VEHICLE, THOROUGHLY]

  • Transmission Compatibility TH400
  • Transmission Compatibility 4L60E
  • Transmission Compatibility 4L65E
  • Transmission Compatibility 4L70E
  • Transmission Compatibility 4L80E
  • Transmission Compatibility T-56
  • Contents Crossmember adapter bracket, 1 plate
  • Drop Distance No Drop
  • Engine Chevy LS Series
  • Finish Temporary Black Shipping Paint. This coating is not intended To Be Final Finish.
  • Finish Type Temporary Black Shipping Paint
  • Product Type Transmission Mounts
  • Kit Type Adapter Bracket Only
  • Material Steel
  • Installation Notes For use with Trans-Dapt #6422
  • Bolts/Studs Included Yes
  • Fastener(s) Included Yes
  • Installation Hardware Included Yes
  • Mounting Bracket Included Yes
  • Mounting Hardware Included No
  • Bracket Finish Black Paint
  • Bushing Color Black
  • Bushing Material None
  • Bolt On Yes
  • Dampening Type Pad
  • Welding Required No
  • Vehicle Family A-Body (GM) 1978-81
  • Vehicle Family G-Body (GM) 1982-88
  • California Proposition 65 WARNING: Cancer. For more info visit www.P65Warnings.ca.gov
  • Photo Disclaimer Actual product design, construction, or included components may vary.

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