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Thread: 4L60 shift 1>2 speed on 12587603

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  1. 05-08-2021 #5
    ColPaul
    ColPaul is offline
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    Correct. The engine and transmission out of a donor 2003 Silverado 1500 were transplanted into a '91 S10 2 door pickup. I couldn't find the XDF for the '03 OS (12579405) so I used the OS from the same truck in '04 (12587603 universal donor OS).
    Last edited by ColPaul; 05-08-2021 at 03:57 AM.
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« APP for PCM Hammer | 4l60e will not shift into 4th gear »

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