'73 with TH400 - won't engage in gear. STUCK IN PARK!

Discussion in 'Troubleshooting & Diagnosis' started by Cptmoney, Aug 20, 2019.

  1. Cptmoney

    Cptmoney Veteran Member

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    I've not tried anything as of yet; I'll put her up on jackstands this weekend and try my hand at putting it in gear from underneath.

    Does the ignition switch have to be in the "run" position to move the gear selector? I've never paid attention to it prior to now. Not sure if it could be shifted into gear with the switch off, key on run, key on accessory, etc....
     
  2. Cptmoney

    Cptmoney Veteran Member

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    And this is what I've been finding...

    Get home tonight, with the intent of pulling the shifter boot to have a peek and see what I can see. Maybe snap a few pics.

    Just for grins, I try shifting out of park - and it moves back and forth like a hot knife through butter. Seriously - like nothing was out of the ordinary at all. Shifts perfectly. So weird.

    I have no idea what's going on. Gotta be something JUST hanging up enough to keep things from sliding back and forth as they ought to....and then SHAZAAM! Everything falls into place as it should, and it's business as usual. So confusing. haha.

    Guess I'll just be thankful - and drive her to work tomorrow!
     
  3. mech393

    mech393 Veteran Member

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    I would disconnect the cable from the trans and see how it moves, if that's ok then its possible the parking paul is hanging up in the valve body . but I wouldn't be driving it until I found out whats going on . it may hang up again when you least expect it.
     
    mrfleet12, Cptmoney and PBZ28 like this.
  4. mark wagner

    mark wagner Veteran Member

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    Check the linkage from the steering column if its worn or loose it may be the problem.
     
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  5. TheMadDoctor

    TheMadDoctor New Member

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    I agree with mark wagner, check out the linkage that is attached to the steering column. One day I came home from work and couldn't put my Camaro in park. I was lucky enough to turn it off, and be on a flat surface. The linkage to the steering column had become disconnected, and I had to find screws to fit it. Don't be like me, fix it before it breaks. Also, you can check the linkage on the driver side of your transmission, something might have worked itself loose there. Good luck!
     
  6. bourbon_scotch

    bourbon_scotch Veteran Member Lifetime Gold Member

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    ...except for the downshift which is electrical
     
  7. Twisted_Metal

    Twisted_Metal Administrator Staff Member Lifetime Gold Member

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    Good catch... I forgot about that in a TH400.
    I don’t think that wiring could ever cause it to be stuck in park.
     
  8. 72BIGBLOCK

    72BIGBLOCK Veteran Member

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    The linkage in the steering column next to the booster I’d check
     

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