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2003 Tacoma 3.4 torque converter won't lock up in OD.

Discussion in '1st Gen. Tacomas (1995-2004)' started by Austin214, Sep 29, 2016.

  1. Sep 29, 2016 at 9:27 AM
    #1
    Austin214

    Austin214 [OP] Member

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    Just started having this issue. Trans shifts flawless otherwise. Did it to me yesterday morning, then after a little bit it decided to lock up. And worked fine after that. Did it again to me this morning, only it worked until I almost got to work then it didn't want to lock up again. Any ideas? I've searched threads but everything I can pull up is for a shudder and I don't have a shudder
     
  2. Sep 29, 2016 at 9:41 AM
    #2
    Digiratus

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    It could be a fluid quantity and/or quality issue. You've checked both, right?
     
  3. Sep 29, 2016 at 5:32 PM
    #3
    Austin214

    Austin214 [OP] Member

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    Yes full on fluid. Looks dirty so will change it out tomorrow. Are the filters on these just a screen? Was planning on using the flush machine at work to flush out my trans but wasn't sure if these had an actual filter.
     
  4. Oct 2, 2016 at 8:39 PM
    #4
    Austin214

    Austin214 [OP] Member

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    Well I pulled codes for a brake switch, replaced and now torque converter locks and unlocks as it should
     
    vasinvictor and gearcruncher like this.
  5. Oct 18, 2016 at 12:49 PM
    #5
    Austin214

    Austin214 [OP] Member

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    As a closure to this thread, I found that I had either a brake bulb that was shorted sending power back through my brake switch into my dash, or the brake switch itself was bad. I replaced all of the bulbs and switch and havnt had an issue since
     
  6. Oct 18, 2016 at 2:24 PM
    #6
    cruiserguy

    cruiserguy Well-Known Member

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    Thanks for the follow up, this will no doubt help someone out in the future. :thumbsup:
     
  7. Oct 18, 2016 at 2:30 PM
    #7
    gearcruncher

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