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Thread: 4L60E Reference Material

  1. #31
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    the wires were pulled out of the connector leading into the tranny on my 93 2500 gmc sierra. the truck wiring harness side !
    is there a color code diagram for the truck side ? with pin numbers ? so i can rebuild the 11pin conector

  2. #32
    Joe (Moderator) joecar's Avatar
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    Default Shift curve relationships

    PT shift table relationships:

    basic relationships:
    1->2 curve should be above 2->1 curve;
    2->3 curve should be above 3->2 curve;
    3->4 curve should be above 4->3 curve;

    additional relationships:
    3->2 curve should be above 1->2 curve;
    4->3 curve should be above 2->3 curve;

    this can be summarized as: the curves cannot cross anywhere;

    if they cross anywhere, then you will not be able to predict what gear the PCM selects when the operating point hits the cross.

  3. #33
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    A few broken links here. I just found this and printed it into a spiral book. Great reference

    http://www.grail-ss.com/GRAIL%20Webs...ETechGuide.pdf

  4. #34
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    so the tcc is commanded at light cruise in 4. and at wot in 2. and 3. gears?

    any idea if the above links are now perhaps accessible somewhere else?

  5. #35
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by dian View Post
    so the tcc is commanded at light cruise in 4. and at wot in 2. and 3. gears?

    any idea if the above links are now perhaps accessible somewhere else?
    No, only in cruise in 3rd or 4th, and never during WOT/PE or high load, and not in 2nd (2nd transitions to 3rd rather quickly).

  6. #36
    Joe (Moderator) joecar's Avatar
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    The link from post #33 above is broken, the destination file of that link does not exist anymore (error 404 file/directory not found).

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