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Thread: JTEC 46RE Part Throttle Shift Tuning

  1. #41
    Tuner in Training
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    not to hijack but any advice on a firmer shift? i went under pressure tab and changed enough to aleast feel a difference but not that big of a diff. did i feel.i have moved the control under hood(forgot exact term for it ) in and out and where it should be.anyways any advice???
    16 mkx
    09 mb 320 coupe
    02 dodge dakota r/t 5.9
    which is my latest toy to tune

  2. #42
    Senior Tuner Jim P's Avatar
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    The TTVA. There is no shift firmness parameters like the RFE transmissions.

  3. #43
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    Jim P thank you so much for all this info , really help

  4. #44
    Senior Tuner Jim P's Avatar
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    Hope it?s helpful for those looking to understand the RE transmissions better.

  5. #45
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    Quote Originally Posted by Jim P View Post
    Attachment 104333

    If you plot it out in a graph it will make more sense. Where the min and max overlap is the boundaries in which a shift will be allowed to occur, provided!!!, post shift acceleration is met and the governor pressure has reached the point to flow through the circuit. HP Tuners is using psi in the post shift acceleration table which I don't believe to be correct. There is a lot of similarities here between the 46RE and 48RE and in the 48RE it is NOT psi, it is a calculated acceleration value, NOT psi. The post shift acceleration table is minimum calculated post shift acceleration required to allow a shift. Your boost pressure is governor pressure to force a shift and your hold pressure is governor pressure to prevent a shift.

    It will take a manipulation of all of this to adjust your shift points, moving your min/max tables (both throttle and OSS rpm) to where you want, raising or lowering governor pressure, raising or lower boost and hold pressures and raising or lowering the post shift acceleration tables.
    this is an awesome description , than the min and max overlap work even in the Nag1 right ?, but you speak about overlap time , and overlap torque right ? if i lower the low time and torque ,I allow the shift to occur early right ?
    thanks in advance

  6. #46
    Senior Tuner Jim P's Avatar
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    This thread is talking about the RE transmissions, which uses throttle position and output shaft speed on the shift tables, in conjunction with meeting criteria of other parameters. I would have to look at a nag1 tune to see what you are asking about. The shift tables on the RFE transmissions also use throttle position and output shaft speed for shift tables, for converter lockup on the RFE it uses throttle position and turbine speed.

  7. #47
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    yes sorry but I have found this info really helpfull and I'm going out of the thread