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Thread: 7747 to 7427 in 91 G Van with 700R4

  1. #1
    Carb and Points!
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    Feb 2022
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    7747 to 7427 in 91 G Van with 700R4

    Ok, I have decided to switch from the 7747 to the 7427. Setup is a 5.7TBI with a 700R4.
    Couple questions.. I have tried to filter through the conversion threads, but trying to pick out 700R4 seems to be a challenge.
    OK I downloaded the Fast 355 for 700R4 XDF. The 350TBI 700R4 bin zip file doesn't seem to work. What bin should I use to start with.
    On repining the ECM. The main writeup refers to a manual. Does anyone have the pinout for the 700R4?
    Last question for the moment if the VSS signal. Can I still use the factory VSS out of the DRAC.

    Thanks

  2. #2
    Super Moderator dave w's Avatar
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    Feb 2011
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    Picture I found in my '7747 to '7427 notes, see attached.

    dave w
    Attached Images Attached Images

  3. #3
    Carb and Points!
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    Feb 2022
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    Thanks. So is C7 on the 7747 not used? The high gear/temp switch?

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