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Frame Extension
InfoVehicle Info Needed
JEGSPART NUMBER: 555-64718

Frame Extension

$5999$64.79You Save$4.80
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G-Body Frame Extension
Frame Extension
  • 1978-1983 GM G-Body
  • 18 in. x 3 in. x 1 in.
  • Black Powdercoat
  • 1/8 (.125) in. Thick Steel
  • Sold Individually

    JEGS 64718 frame extension is designed to replicate the longer driver-side frame rail of the 1978-1983 GM G-Body cars. This allows for the proper installation of a JEGS transmission crossmembers on 1978-1983 G-Body Cars.

    JEGS 555-64718 Frame Extension Includes:

    • (4) 7/16 in. -20 Thread x 1 1/4 (.250) in. Under Head Length x 5/8 (.625) in. Hex Bolts
    • (4) 7/16 in. -20 Thread x 5/8 (.625) in. Hex Nuts
    • (8) 15/16 (.938) in. OD x 1/2 (.500) in. ID Flat Washers

    JEGS 555-64718 Frame Extension Fitment:

    • 1978-1983 Buick Regal (including Grand National)
    • 1978-1983 Chevrolet Malibu
    • 1978-1983 Chevrolet Monte Carlo
    • 1978-1983 Oldsmobile Cutlass
    • 1978-1983 Pontiac Grand Prix

    JEGS 555-64718 Frame Extension Note:

  • Some 1983 model G-body vehicles were originally equipped with a 200-4R transmission and will not require this frame extension. Some 1984 G-body vehicles came with the early (pre-1984) frames and will require this frame extension. If you are unsure, 1984 and later models will feature two mounting locations for the transmission crossmember approximately 14 in. behind the front set of mounting holes.

    • Clears Dual Exhaust & Allows Transmission Swaps

    These transmission crossmembers are made from 1-1/2" x 2-1/2" x 0.120" rectangular tubing. The double hump design clears dual exhaust when using exhaust kit 555-30556 and headers 555-30060.

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    Features:

    • Tubular Design
    • Clears Dual Exhaust
    • Options for TH350, 700R4 & TH400 Transmission
    • Black Powder Coated

    Part TypeFrame Rail
    Product LineJEGS Double Hump G-Body Transmission Crossmembers
    BrandJEGS
    Package Height4.0
    Package Width5.0
    Package Length25.0
    Weight5.42 PG
    Part CategoryReplacement Parts
    UniversalNo
    PositionRear
    Frame Rail FinishBlack powdercoated
    Quantity1
    Part FitmentUniversal
    Frame Rail MaterialSteel
    Frame Rail PositionDriver side
    Package Qty1
    Package TypeEA
    No Questions
    No Reviews

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