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Thread: WOT shift MPH to 0, does it work?

  1. #1
    Tuner in Training
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    WOT shift MPH to 0, does it work?

    Hi,

    I was reading here that to get the trans to respond to RPM only when in D (3) at WOT that one can set the WOT shift speed 1-2 and 2-3 to 0.

    Makes sense, but does it work?

    I'm wondering if it would completely foul up WOT downshift.

    Ron
    Last edited by RonSSnova; 07-31-2012 at 07:02 PM.
    Y2K C5 Coupe (11.10 @ 123)

  2. #2
    Tuner wreckwriter's Avatar
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    No, it really doesn't work well. Just spend the time finding the right MPH.

    2008 Pontiac G8 GT, IHRA Modified, NHRA Pro ET

  3. #3
    Tuner in Training
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    Good to know. Thanks.

    I have one log of a run when the car actually shifted for me manually. So I know the MPH and the RPM where it shifted. How much offset works?

    I was on street rubber, so I really couldn't use "D" for the runs as first gear was useless and it would have shifted early.

    I could post that log if I knew how????

    Ron
    Last edited by RonSSnova; 07-31-2012 at 07:03 PM.
    Y2K C5 Coupe (11.10 @ 123)

  4. #4
    I found that setting mph about 3-5 under the actual rpm you want to command works well.
    -------------------------------------
    01 SS Red A4 #4987

  5. #5
    Tuner in Training
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    Well, according to logs from last evening, my C5 is shifting by mph.
    These were the first runs with drag radials and enough traction to floor it out of the hole.
    I moved rpm around and it didn't care.

    Ron
    Y2K C5 Coupe (11.10 @ 123)

  6. #6
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    I seem to have better luck with the MPH. Mine pretty much ignores the RPM.
    08 Black C6, A6, E-Force, Headers, LS9 Cam

  7. #7
    Advanced Tuner oakley6575's Avatar
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    I like mine to be triggered by RPM. Both mph and rpm have to be triggered for it to shift. So I set my mph 3-5 under what it really should shift at and then let it shift once it hits the rpm I want.
    2003 Chevy Silverado Daily Driver, 408 Iron Block,
    LS3 Heads/Intake, 231/239 114, 4L80e, Yank SST 3200.

  8. #8
    Advanced Tuner Ben Charles's Avatar
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    I zero out the WOT shift MPH and use just RPM, works like a champ.

    Email Tunes, PM me for more info
    LT4 9.1cr, Meth, Stroked and Twin screwed
    4L80E/Fab 9, NGK AFX WB

  9. #9
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    Ok. I'm going to try it.
    BTW, what car do you have? Mine is a C5 vette and have read that they might be different?
    Thanks.

    Ron
    Y2K C5 Coupe (11.10 @ 123)

  10. #10
    Tuner wreckwriter's Avatar
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    Quote Originally Posted by Ben Charles View Post
    I zero out the WOT shift MPH and use just RPM, works like a champ.
    Didn't work for me.

    2008 Pontiac G8 GT, IHRA Modified, NHRA Pro ET

  11. #11
    Advanced Tuner Ben Charles's Avatar
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    You have a 6L80E? I have only seen it work on 4L60/80E's

    Email Tunes, PM me for more info
    LT4 9.1cr, Meth, Stroked and Twin screwed
    4L80E/Fab 9, NGK AFX WB

  12. #12
    Tuner wreckwriter's Avatar
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    Quote Originally Posted by Ben Charles View Post
    You have a 6L80E? I have only seen it work on 4L60/80E's
    I did at the time, yes. Now I have a TH400

    2008 Pontiac G8 GT, IHRA Modified, NHRA Pro ET