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200r4 external lock-up question

Discussion in 'The "Juice Box"' started by jaye, May 9, 2018.

  1. jaye

    jaye Well-Known Member

    Can I take a 200r4 transmission and install an external 4th gear lock-up in it. Its the one that operates off a oil pressure switch and can be turned of/on manually through an electrical switch. I've seen kits however, I think it would be cheaper to just purchase all the pieces separately. Has anyone completed this modification?
    Thanks
    Jaye
     
  2. 455monte

    455monte Well-Known Member

    Im not sure what u are trying to achieve here?
    I run a b and m controller on my 200 4r.
    It has as adjustable knob so i can control what vehicle speed it turns on power to the factory style solenoid.
     
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  3. rkammer

    rkammer Gold Level Contributor

    Where does the controller get vehicle speed from? Electrical or mechanical?
     
  4. papa roger

    papa roger Well-Known Member

    I just had my 200-4R internally grounded when it was assembled by Janis Transmission. I only had to run a hot wire from my fuse box through a toggle switch under my dash and I turn the overdrive lockup on whenever I want to. I normally only engage it at 2200 rpm or over become it drops the rpm below 1700 rpm and my engine lugs and jerks a bit. Roger

    On The Eighth Day God Created Buick
     
  5. 455monte

    455monte Well-Known Member

    The b and m has a adapter that screws onto side of trans peedo cable that has 2 wires that run to the cobtroller.
    Its basically a vss
     
  6. rkammer

    rkammer Gold Level Contributor

    Very cool. And the original speedometer still works like it did before the addition of the VSS?
     
  7. knucklebusted

    knucklebusted Well-Known Member

    It is just a pass through, like a very short extension. It has a square pin that goes into the transmission and screws down like a speedo cable and has a square hole on the outside with threads so you can screw down the speedo cable.
     
  8. jaye

    jaye Well-Known Member

    Roger that’s what I’m talking about doing, there is a kit that uses an oil pressure switch attached to the 4th gear
    When fluid pressure from 4th gear pressurized the torque converter will lockup if you have it switched on
     
  9. papa roger

    papa roger Well-Known Member

     

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