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Switch Pitch Riviera question

Discussion in 'A boatload of fun' started by Deathon4wheels, Feb 25, 2008.

  1. Deathon4wheels

    Deathon4wheels Outlaw of the Riviera

    I bought a 2500 stall torque converter from TA, will my TH-400 s/p accept that? Thanks
     
    Deathon4wheels, Feb 25, 2008
    #1
  2. 2 68 Rivs

    2 68 Rivs Gold Level Contributor

    Sorry, no. The S/P trans has a different input shaft from the regular Turbo 400. Torque converters don't interchange either way.
     
    2 68 Rivs, Feb 25, 2008
    #2
  3. Deathon4wheels

    Deathon4wheels Outlaw of the Riviera

    So I can't use it, alright. But what do I do now? I'm doing major engine work and the power and is going to be moved probably right around 2500-2700. How can i use the s/p to my advantage, i think that it stalls at 1300 and 3300 or somehting like that, am I right?
     
    Deathon4wheels, Feb 25, 2008
    #3
  4. CTX-SLPR

    CTX-SLPR Modern Technology User

    You'll need a special switch pitch converter to use the switch pitch. The low stall is for the top end/normal driving. The high stall is for stoplights so you don't creep, downshifts, and launches.
     
    CTX-SLPR, Feb 25, 2008
    #4
  5. Deathon4wheels

    Deathon4wheels Outlaw of the Riviera

    so the high stall will just automatically kick in if I stomp on it? How does the transmission know which to use? will the ol s/p be able to handle the fury of my rebuilt and beefed up 430?
     
    Deathon4wheels, Feb 25, 2008
    #5
  6. DaWildcat

    DaWildcat Platinum Level Contributor

    DaWildcat, Feb 26, 2008
    #6
  7. Steve Schiebel

    Steve Schiebel Well-Known Member

    Switches at the throttle linkage control S/P converter actuation. You can also use a S/P converter from a similar vintage GM ST300 trans. It's about and inch smaller diameter S/P converter and the rpm stall ranges are higher. I've got those exact figures somewhere, just not available to me now. I pulled one from a junkyard '65 Olds Gutless and used it as a core to a local trans shop. The refurbished unit cost me under $100.
     
    Steve Schiebel, Feb 27, 2008
    #7
  8. Steve Schiebel

    Steve Schiebel Well-Known Member

    11 converter ST300 2-speed has a low stall speed of approximately 2300-2500 rpm. High stall speed of approximately 2800-3000 rpm.

    12 converter in TH400 3-speed has a low stall speed of approximately 1800 rpm. High stall speed of approximately 2600-2800 rpm.

    http://www.442.com/oldsfaq/oftsp.htm
     
    Steve Schiebel, Feb 27, 2008
    #8

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