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Thread: How to stop upshift from 1st to 2nd while in 1st gear 2003 silverado 4L60

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    Lifetime Member mvvette97's Avatar
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    Default How to stop upshift from 1st to 2nd while in 1st gear 2003 silverado 4L60

    Hey guys is there a way to keep my truck from shift out of first while my gear selector is in the first gear location? I was goofing around today and had my tires covered in mud so I pulled out on the hard surface and pulled it to 1st on the selector and held the brake and hammered down, haha. Even though I was in first it still upshifted to 2nd gear while the gear selector was still in 1st gear. It won't hold low gear. I thought I had it set to hold first gear but I must of missed something.
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  2. #2
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    My original answer (which I deleted) referenced 4L80 transmissions - sorry about that - never post while drinking the first coffee of the day !

    Your 4L60 tune looks OK - were you in 4WD mode by chance ?

  3. #3
    Joe (Moderator) joecar's Avatar
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    OP's other thread (I'll merge it here later): How-to-stop-upshift-from-1st-to-2nd-while-in-1st-gear-2003-silverado



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