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Hot Rods Torque Converter Lockup Dash Switch

Discussion in 'The Hokey Ass Message Board' started by AngleGrinder, Aug 2, 2019.

  1. AngleGrinder
    Joined: May 4, 2008
    Posts: 30

    AngleGrinder
    Member

    Good day ... Bought a Torque Converter lock up kit for a rebuilt 200 4R complete with a mechanical dash switch to lock up my torque converter in 4th.
    I want to use the existing brake pedal switch to kill the Torque Converter lock up when I hit my brakes.
    My question... Is there a dash switch that when power is cut (using brake pedal) that will reset the dash switch to off ? Thank you.
     
  2. Doublepumper
    Joined: Jun 26, 2016
    Posts: 1,685

    Doublepumper
    Member
    from WA-OR, USA

    You could use a momentary switch on the dash to power a relay and use the stop switch to kill power to it. Wire it up so that switching on the relay with the momentary switch would latch the relay and energize the TC and stepping on the brakes kills control power to the relay and de-energizes the TC.
     
  3. AngleGrinder
    Joined: May 4, 2008
    Posts: 30

    AngleGrinder
    Member

    Thank you Double P, was hoping an e switch on the dash could accomplish.
     
  4. Cosmo50
    Joined: Sep 8, 2011
    Posts: 225

    Cosmo50
    Member
    from California

    6sally6 likes this.
  5. AngleGrinder
    Joined: May 4, 2008
    Posts: 30

    AngleGrinder
    Member

    Double-P, I don't quite get that the momentary switch could activate the relay and it would stay activated even after the momentary switch would go back to off. I'm fogged up, sorry. Thanx so far Double P
     
  6. AngleGrinder
    Joined: May 4, 2008
    Posts: 30

    AngleGrinder
    Member

    6sally6 and Cosmo50 like this.
  7. saltflats
    Joined: Aug 14, 2007
    Posts: 13,059

    saltflats
    Member
    from Missouri

    Get a brake switch like this.
    s-l640.jpg
     
  8. AngleGrinder
    Joined: May 4, 2008
    Posts: 30

    AngleGrinder
    Member

    Hey Dude, thanx, have to read up on it though cuzz its electronic, yuk.
     
  9. Mimilan
    Joined: Jun 13, 2019
    Posts: 1,232

    Mimilan
    Member

    Very easy to do with a relay.
    You use a push button to activate the relay. (When released it is off)
    On the output side of the relay you run a wire around to the button side of the relay (This latches it to stay on after the button is released)
    Now this latching wire MUST be wired in series with the brake switch to break the circuit and switch it off.
    Use a GM brake switch with the cruise control feature.
     
  10. AngleGrinder
    Joined: May 4, 2008
    Posts: 30

    AngleGrinder
    Member

    Thanx, do appreciate.
     
  11. Gman0046
    Joined: Jul 24, 2005
    Posts: 6,256

    Gman0046
    Member

    On my 60 Pontiac I'm using a second floor mounted dimmer switch to lock up the 2004R torque convertor and a small light bulb on the bottom of the left dash in the vicinity of the parking brake release handle to remind me when the torque convertor is locked up. A safety item as I don't have to divert my eye balls from the road looking for a lock up switch
     
    saltflats likes this.
  12. Mimilan
    Joined: Jun 13, 2019
    Posts: 1,232

    Mimilan
    Member

    Also if you want to be "creative" , you can add a GM vacuum switch between the output of the relay and the Torque Converter lockup.
    This way it will unlock on acceleration/kick down , but the relay still stays latched so it will re-engage lock-up when you lift off the gas.

    cheers Mimi
     
  13. blowby
    Joined: Dec 27, 2012
    Posts: 8,663

    blowby
    Member
    from Nicasio Ca

    I have exactly the same thing.

    If I understand the original question, why would you want to turn off the lockup after tapping the brakes in OD? If I'm getting off the highway I just hit the switch and unlock, rather than having to constantly turn it back on.
     
  14. bowtie56jw
    Joined: Aug 2, 2010
    Posts: 218

    bowtie56jw
    Member

    im running a gm vacuum switch and a toggle switch, i can leave the toggle on and when it shifts into 4th it locks up, let off the gas and it unlocks as it should. i can run with the switch off and no lock up but have all 4 gears. fun to play with.
     
  15. gimpyshotrods
    Joined: May 20, 2009
    Posts: 24,085

    gimpyshotrods
    ALLIANCE MEMBER

    I generally set them up to run fully automated. Vacuum switch and brake light switch. At minimum, automatic lockup, in 4th, only.

    If a customer requests it, I put in a switch to disable the lockup, when desired.

    You will be hating life if you have a fully manual system, the first time you forget to unlock it, at an intersection. Your insurance company might have some questions that you don't want to answer. Answer those questions wrong, and you might see your policy voided.
     
    Last edited: Aug 3, 2019
  16. AngleGrinder
    Joined: May 4, 2008
    Posts: 30

    AngleGrinder
    Member

    Thanx, appreciate
    Because I can't be trusted to "just hit the switch and unlock". I'd prefer use the lock up similar to a cruise control. Thank you, appreciate.
     
  17. AngleGrinder
    Joined: May 4, 2008
    Posts: 30

    AngleGrinder
    Member

    This sounds good thanx appreciate.
     
  18. AngleGrinder
    Joined: May 4, 2008
    Posts: 30

    AngleGrinder
    Member

    Good heads up, that's why I want the sucker off when I hit the brake pedal similar to cruise control. Appreciate the advise thanx.
     

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