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Thread: ZF8 > trans > tq man > gen > max tq limit > shift > overall [TCM 46951]

  1. #1
    Advanced Tuner
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    ZF8 > trans > tq man > gen > max tq limit > shift > overall [TCM 46951]

    ZF8 > trans > tq man > gen > max tq limit > shift > overall [TCM 46951]

    This table doesnt make a whole lot of sense to start with. Like for the trans to be able to downshift from 8th to 7th, or even 6th, but never 5th or 3rd? and 4th ONLY when torque is below -148 wth? if I am on the freeway and pull left paddle for about .750 sec it goes from 8th to lowest gear possible, doesnt it? It does. So what do these numbers represent? And what is with the mysterious -148? Was this thrown in just for fun or did the germans make a mistake and not notice it til 2020?

    From 7th gear its possible to go into low? Humm

    I changed the -148 to 959 like the newer stuff (which did not seem to effect shifting whatsoever) but am curious about its origins.
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    don tanklage

  2. #2
    Tuner
    Join Date
    Aug 2021
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    Indianapolis Area
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    There is much more than just "random number" in the stock tune.
    I suggest not changing it.

    Its origin is related to ZF8 capabilities