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Larger Positive Battery Terminal

Discussion in '1st Gen Tundras (2000-2006)' started by TEX9, May 13, 2025 at 9:13 AM.

  1. May 13, 2025 at 9:13 AM
    #1
    TEX9

    TEX9 [OP] New Member

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    My 4x4 2006 Tundra has a larger positive terminal. The negative one is smaller. These are the originals. If I replace the positive terminal for a smaller one, will it have any impact on my systems? FYI, I'm a 70-year old gal trying to get my sweet Tundra running. TY
     
  2. May 13, 2025 at 9:18 AM
    #2
    Sirfive

    Sirfive Master Procrastinator

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    Batteries have ‘always’ had different sized terminals, and the positive is bigger. If the positive side was overtightened & stretched, it can usually be bent a bit to fit better. Kinda like how some electric plugs one side is bigger so you dont plug it in upside down.
     
    whodatschrome likes this.
  3. May 13, 2025 at 9:27 AM
    #3
    ATBAV8

    ATBAV8 New Member

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    The question that needs to be asked is; why are you replacing the positive terminal? What are the symptoms of your truck not running? It might be a good idea to post some pictures of what you're trying to acheive.
     
  4. May 13, 2025 at 9:50 AM
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    BubbaW

    BubbaW Blessed 2 B above Ground

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    Something tells me someone pryor to you changed the terminals. If your positive terminal does not look similar in style to below pic, it’s not original. As requested, picture of your battery setup would help.

    IMG_6080.jpg
     
  5. May 13, 2025 at 9:55 AM
    #5
    eddiefromcali

    eddiefromcali New Member

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    to answer your question, no...it wont hurt anything.
     
  6. May 13, 2025 at 9:59 AM
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    Sirfive

    Sirfive Master Procrastinator

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    she’s 70. Boy scouts are about to start showing up for honey-do’s, and you dont think they’ll install the battery wrong? Thats why you teach kids to put the ground on first. If it doesnt fit, youre doing it wrong.

    my kepworth chynisse lithium battery also has its lugs staggered, and they’re machined copper.
     
    BubbaW likes this.
  7. May 13, 2025 at 9:59 AM
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    ATBAV8

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    It really depends on what she has connected to the positive side. Which is why we're asking for pictures.
     
  8. May 13, 2025 at 10:10 AM
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    eddiefromcali

    eddiefromcali New Member

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    My answer still stands...the actual terminal swap doesn't hurt anything. What an idiot does after is a different story.

    How would a smaller diameter terminal have any impact on the electrical system? I agree that pictures would help figure out what's going on. I suspect a worn battery post and its no longer tightening...which a post terminal shim would likely fix.
     
    Sirfive[QUOTED] likes this.
  9. May 13, 2025 at 10:50 AM
    #9
    eddiefromcali

    eddiefromcali New Member

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    What other size can we talk about? 1st reply even talks about different sized terminals :rofl:. She says herself that they're different sizes....we all know the post diameter might be different

    You didn't answer my question either.

    If she got a new battery that has a smaller positive post, going with a smaller terminal wont hurt a thing.
     
  10. May 13, 2025 at 10:55 AM
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    BubbaW

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    SAE and JIS beg to differ.
     
  11. May 13, 2025 at 5:43 PM
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    ATBAV8

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    And yet another worthless thread started by the one thread wonders. I'm not sure of the purpose, but it sure gets old.
     
    The Black Mamba likes this.
  12. May 13, 2025 at 7:02 PM
    #12
    The Black Mamba

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    Imma keep it stock

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