66 St400 BS code Nailhead

Discussion in 'The "Juice Box"' started by jmos4, Mar 8, 2020.

  1. jmos4

    jmos4 Well-Known Member

    Hi all,

    Curious if there's anything special about a ST400 nailhead bell housing BS coded trans and what is the going rate for a core?

  2. looks like a Riviera GS code

  3. SpecialWagon65

    SpecialWagon65 Ted Nagel

    BS should be a desirable core.
    GranSportSedan likes this.
  4. 300sbb_overkill

    300sbb_overkill WWG1WGA. MAGA

    I would of thought the BJ would be more desirable.:D:D
    Lucy Fair likes this.
  5. Now that's the kind of humor I expect from car people. Lol
    johnriv67 likes this.
  6. LARRY70GS

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

    Last edited: Mar 9, 2020
    GranSportSedan likes this.
  7. Dragdoc

    Dragdoc Well-Known Member

    Hey! I resemble that remark!

    Whats worse? Getting the shaft or a tranny BJ?
    Houmark likes this.
  8. LARRY70GS

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


    BRUCE ROE Well-Known Member

    There is value to someone with that bolt pattern, and also with a switch
    pitch oil passage. BOP cases are far more common. Bruce Roe
  10. SpecialWagon65

    SpecialWagon65 Ted Nagel

    I was trying to find the things that were upgraded for the 65 GS transmission... found this:

    The 1965 Riviera Gran Sport benefited from an improved transmission introduced a year earlier: the Super Turbine 400. Dick Sweeney notes that the Super Turbine 400 featured a reinforced valve body. These transmissions also benefited from recalibration that allowed the Gran Sport to shift at higher rpm. The three-speed Super Turbine 400 featured four pinions in each planetary gearset, versus the usual three.

    from Hemmings, but that is why it is a desirable unit! (He said unit )
  11. jmos4

    jmos4 Well-Known Member


    Thanks for the info, any ideas on what they're going for?

    I got it with a 425 core so no clue on what condition it's in.

  12. telriv

    telriv Founders Club Member

    Since condition & workings are unknown it's only value is core value which would be around $100.00 give or take.
  13. johnriv67

    johnriv67 Well-Known Member

    I know the location of one if you’re interested
  14. 65-66 nailhead st400 cores go for about $250 from what I have witnessed. a 65 Riv GS core probably has a bit more value

    BRUCE ROE Well-Known Member

    A TH425 being a front wheel drive trans used in Eldo and Toro. Bruce Roe

    BRUCE ROE Well-Known Member

    Hemmings, huh? All 400s have 4 pinions, why would that massive cast
    iron valve body need to be reinforced? He should have talked about its
    switch pitch feature. Bruce Roe
  17. SpecialWagon65

    SpecialWagon65 Ted Nagel

    Often wrong, seldom in doubt!
  18. I believe he's referring to a 425 nailhead core not a th425 transmission
  19. jmos4

    jmos4 Well-Known Member


    Yes a 425 nailhead engine, MW code, 704 casting number, rwd trans,

    Guy I got it from said it came from a Riviera but never know if its factory or replacement


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