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Technical 1939 GM door lock tumbler removal?

Discussion in 'Traditional Hot Rods' started by AGELE55, Dec 2, 2022.

  1. AGELE55
    Joined: Jan 4, 2018
    Posts: 621

    AGELE55
    Member

    Searched to no avail…. Any idea how the tumbler comes out of a 39 GM door or trunk .
     

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    Last edited: Dec 4, 2022
  2. squirrel
    Joined: Sep 23, 2004
    Posts: 56,041

    squirrel
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    I forget....but something about that handle, makes me think it's not from a 39 Chevy?


    handle.jpg
     
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  3. Paint
    Joined: Nov 18, 2005
    Posts: 309

    Paint
    Member

    There is a small pin in the lower shaft almost to the end where it goes into that latch. You can see it in this picture. s-l1600.jpg
     
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  4. vtx1800
    Joined: Oct 4, 2009
    Posts: 1,715

    vtx1800
    ALLIANCE MEMBER

    Forty plus? years ago I needed a similar Chevy handle rekeyed and the "old" (far younger than me now) local locksmith took it as a challenge, a few days later he had it ready...I think he had to drill in "just the right spot" to get it disassembled to rekey. I hope my memory isn't failing me.....that's my story and I am sticking to it:)
    The sad story is that locksmith retired, another guy took over and he died a couple of years ago and he was in his 80's.
     
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  5. uncleandy 65
    Joined: Jan 14, 2013
    Posts: 4,148

    uncleandy 65
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    These use to have a pin that you removed on the shaft and then the lock would come out.
     
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  6. AGELE55
    Joined: Jan 4, 2018
    Posts: 621

    AGELE55
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    Never said Chevy… I called it GM. It’s from a Pontiac ;)
     
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  7. AGELE55
    Joined: Jan 4, 2018
    Posts: 621

    AGELE55
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    Ahhh…I spy a roll pin. :)
     
  8. AGELE55
    Joined: Jan 4, 2018
    Posts: 621

    AGELE55
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    Ok…I see a roll pin in the pics. Does the key need to be in it to extract the tumbler?
     
  9. squirrel
    Joined: Sep 23, 2004
    Posts: 56,041

    squirrel
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    The lock cylinder does not look like GM lock cylinders. That's what really caught my eye.
     
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  10. The37Kid
    Joined: Apr 30, 2004
    Posts: 30,735

    The37Kid
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    This is sitting on my desk next to my coffee cup if it is of any help. Bob DSCF4995.JPG DSCF4997.JPG
     
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  11. squirrel
    Joined: Sep 23, 2004
    Posts: 56,041

    squirrel
    Member

    The glovebox lock doesn't have the little "door" that the key opens, like outside locks have.
     
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  12. Joe H
    Joined: Feb 10, 2008
    Posts: 1,546

    Joe H
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  13. AGELE55
    Joined: Jan 4, 2018
    Posts: 621

    AGELE55
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    Cool… on the one lock handle I can get to , it indeed has a four digit number stamped into it. Maybe this will work out. Thanks.
     
  14. AGELE55
    Joined: Jan 4, 2018
    Posts: 621

    AGELE55
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    Ok…making progress. I drove out the small pin and the tumbler assembly slid out easily. FYI- the key code is stamped in two places. On the shaft of the handle itself and also on the shaft of the tumbler assembly.
    Now I’d like to disassemble the tumbler, but not seeing a way forward. Anybody have a clue? E17AC0F1-2D03-418E-B1A0-AD630BD57E15.jpeg 2DE23D75-0182-4B28-9773-47674FD70696.jpeg
     
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  15. squirrel
    Joined: Sep 23, 2004
    Posts: 56,041

    squirrel
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  16. AGELE55
    Joined: Jan 4, 2018
    Posts: 621

    AGELE55
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    I’m not sure what a “side bar” tumbler is? But the tumbler has a “bar” imbedded in its side (see earlier pic). Tried prying it out gently, but scared of boogering it up. Maybe I need to use more oomph?
     
  17. squirrel
    Joined: Sep 23, 2004
    Posts: 56,041

    squirrel
    Member

    This is a sidebar lock.

    lesson01.gif

    It works quite differently from a normal wafer type lock, which is shown below:

    300px-Disc_tumbler_with_key.png

    Perhaps if you take a few more pictures of the lock cylinder, showing all sides of it, as well as the keyhole, we might be able to help you figure it out. But I don't think it's a 1939 GM lock cylinder.
     
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  18. AGELE55
    Joined: Jan 4, 2018
    Posts: 621

    AGELE55
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    Ah shit Squirrel... thats the second time you told me this doesn't look like a 39 GM lock cylinder... and crap...I uploaded the wrong pic.. my bad.
    I'm out on date night with mama now, so I'll fix my F up tomorrow.
    I see what you mean though. The handle is identical, but the cylinder is different. Mine has the little slide door thing covering the hole.
     
  19. Rusty J
    Joined: Nov 25, 2019
    Posts: 153

    Rusty J
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    I had my locks rebuilt by a locksmith - who also had NOS keys, super easy, only cost a few peanuts. Just my 10 cents
     
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  20. squirrel
    Joined: Sep 23, 2004
    Posts: 56,041

    squirrel
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    and you missed out on learning how locks work. That's too bad.
     
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  21. AGELE55
    Joined: Jan 4, 2018
    Posts: 621

    AGELE55
    Member

    The pic originally included was a trunk handle, which I was considering buying. These pics are of my actual door handles. One was in the passenger door and another identical handle was in a box of stuff that came with the car.
    I snapped a couple pics showing the cylinder details. I’m thinking I need to remove the brass bar imbedded in the side? ..but don’t want to booger it. DF240779-55D2-4A2C-A2BE-4F4A2449D562.jpeg A6CED169-6CFE-4659-9FB4-25F79A82E353.jpeg 16DD9423-A37E-4A79-907F-A4A0F40C9244.jpeg 31B9C79B-D66A-4452-8045-33106533654C.jpeg DCC7CC42-A549-45C3-98FB-A22E321DFBD7.jpeg
     
  22. squirrel
    Joined: Sep 23, 2004
    Posts: 56,041

    squirrel
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    pages 4 and 5 in my link above show the lock being taken apart, but it's a different type of lock, so it comes apart differently. I don't remember how the one you have comes apart...I think you have to uncrimp the chrome cover over the end, then deal with the spring as you pull the tumbler out of the main housing.

    Why do you want to take them apart? Do you want to set the locks to work with a key you already have? or do you just want to make a key that fits one of them?

    You can make a key from the number, using the info in the link I posted above. It's going to take a while to get the hang of it, but it's a fun way to while away a few days. Get a bunch of B1 key blanks first.
     
  23. AGELE55
    Joined: Jan 4, 2018
    Posts: 621

    AGELE55
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    The two handles have different key codes. The plan was to have keys cut for one of them and then have the other keyed to match. I remember about 40 years ago disassembling a car lock and filing the little tumblers…but I’ll be damned if I remember why…lol. Old age sucks that way. I was considering trying to key match it myself.
     
  24. AGELE55
    Joined: Jan 4, 2018
    Posts: 621

    AGELE55
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    I had the chrome cover off one of them to fix the little door, which was stuck open. All I saw there was the recesses for the “door plate” and two tiny springs. There is a big spring down in the cylinder hole that keeps tension on the entire cylinder.
     
  25. squirrel
    Joined: Sep 23, 2004
    Posts: 56,041

    squirrel
    Member

    You do have to take it apart more to get to the tumblers, so let us know how that goes, please. Or if you ckicken out and bring it to a locksmith, do they still remember how the old ones work? :)

    It's been a long time since I had a 1939 GM, and I don't think I ever got the tumblers out on that one. My memory also gets old. But I've played with lots of the ignition lock cylinders, rekeyed them to match the door locks, etc
     
  26. AGELE55
    Joined: Jan 4, 2018
    Posts: 621

    AGELE55
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    Lol…wish me luck.
     
  27. AGELE55
    Joined: Jan 4, 2018
    Posts: 621

    AGELE55
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    Ok, after staring at this thing all morning, I’m thinking I need a key to rotate it for disassembly. I found a guy on eBay that will cut a key set with the code number for $9.50 and free shipping.
    Should be here next week. I’ll keep you posted.
     
  28. squirrel
    Joined: Sep 23, 2004
    Posts: 56,041

    squirrel
    Member

    If you take pictures of all sides of the lock cylinder, maybe we could see if there is a stamped metal cover over the springs, like the ignition lock cylinders have? That's what you have to remove to work on the lock.

    lock.jpg
     
  29. AGELE55
    Joined: Jan 4, 2018
    Posts: 621

    AGELE55
    Member

    Check out the pics from earlier. There is no stamped metal cover. There is a brass bar on one side and 90 degrees from that bar are two and a half holes. The brass bar looks substantial and isn’t a cover. No other clues.
     

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