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Thread: Excessive timing retard on full throttle down shift

  1. #1
    Senior Member
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    Feb 2005
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    Default Excessive timing retard on full throttle down shift

    Hey all, how can we soften the timing retard on full throttle downshift without adjusting minimum timing?
    this only seems to happen when in top gear, plant your foot, the car hits a brick wall downshifts then comes alive.!!

  2. #2
    Junior Member
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    Nov 2012
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    I have the same problem.

    I started looking at T43 now, and after I m going to do tests.

  3. #3
    Junior Member
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    Nov 2012
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    Problems...
    Without any modification in T43, just speedometer and rpm limiter, this problem remains!

  4. #4
    Joe (Moderator) joecar's Avatar
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    Apr 2003
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    27,752

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    Is engine exceeding any engine sanity table...?

    Post files.

  5. #5
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    torque management strategy , did you screw with the torque tables ??

  6. #6
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    Default

    I did modify the torque tables, with or without modification it still retards.

  7. #7
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    Default

    Quote Originally Posted by AGRO View Post
    I did modify the torque tables, with or without modification it still retards.
    Have a play with these Click image for larger version. 

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  8. #8
    Senior Member auspeed's Avatar
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    I found by disabling the Torque Management on upshift.... made the transmission perform poorly, however I'm curious to know how you control how much spark is retarded on the upshift??

  9. #9
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    Any movement on this?

  10. #10
    Junior Member
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    Aug 2018
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    Default

    I wouldn’t fully shut off the TQ management. Just reduce it.
    Tuning the trans shift behavior is in the ECU

    Post up your file. You probably have some nannies still turned on in the ECU.

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