ST400 swap in 65 GS with ST300

Discussion in 'The "Juice Box"' started by gs65, Jan 24, 2019.

  1. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    picture of other side of the converter?
  2. gs65

    gs65 Well-Known Member

    There’s one in the earlier post. 3 lugs
  3. wkillgs

    wkillgs Gold Level Contributor

    The converter from the ST300 GS will have a higher stall speed, I'd use that one. Should be about 2000/3000 rpm.
    The Riv converter is larger and will have lower stall speeds.
    The 401 GS flexplate should have two sets of bolt holes to fit either converter. The flex plate you pictured will only fit the larger converter.

    The converter you pictured does look like the smaller 12" one.
    Last edited: Feb 21, 2021 at 5:54 PM

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