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2020 TACOMA WONT SHIFT OUT OF 3RD

Discussion in '3rd Gen. Tacomas (2016+)' started by Bulletproofmafia, May 4, 2021.

  1. May 4, 2021 at 1:04 PM
    #41
    Bulletproofmafia

    Bulletproofmafia [OP] Well-Known Member

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    thank you, i didnt know it should work in s mode so we could have something there possibly
     
    Steves104x4 and StayinStock like this.
  2. May 4, 2021 at 1:05 PM
    #42
    Bulletproofmafia

    Bulletproofmafia [OP] Well-Known Member

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    yes been in touch with toyota corp 5 different times over the past month.
     
  3. May 4, 2021 at 1:05 PM
    #43
    Vlady

    Vlady Well-Known Member

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    CC works in S4 -S6.
     
  4. May 4, 2021 at 1:05 PM
    #44
    StayinStock

    StayinStock WHATEVER.

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    Best of luck.
     
  5. May 4, 2021 at 1:08 PM
    #45
    Vlady

    Vlady Well-Known Member

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    If they call you back, ask them why it won't upshift from 4th at speeds above 65
     
  6. May 4, 2021 at 1:10 PM
    #46
    angerbot

    angerbot Well-Known Member

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    Bulletproofmafia [OP] likes this.
  7. May 4, 2021 at 1:18 PM
    #47
    Bulletproofmafia

    Bulletproofmafia [OP] Well-Known Member

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    at first i thought it was gearing, but every time the dealer did an update to the computer it would resolve this issue for about 500 miles, so it really made me re think gearing problems
     
  8. May 4, 2021 at 1:20 PM
    #48
    angerbot

    angerbot Well-Known Member

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    Well a regear won't make it worse and if it doesn't solve it at least you have new gears when they finally do get it fixed.
     
    Bulletproofmafia [OP] likes this.
  9. May 4, 2021 at 1:21 PM
    #49
    dunlap837

    dunlap837 Well-Known Member

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    The reason is because the ECU learning allows for the ECU to "learn" that this rpm is most efficient for the conditions you are driving. That is why the issue resolves for 500 miles after a reset only to come back.

    Your truck is operating exactly as designed by the Engineers at Toyota, and the flaws are in the ECU code.

    If you want to wade into the weeds of vF Tuner, this flaw can be fixed by modifying the 17 different transmission torque tables that control when the truck shifts.
     
  10. May 4, 2021 at 1:25 PM
    #50
    Bulletproofmafia

    Bulletproofmafia [OP] Well-Known Member

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    if thats what must be done thats what i shall do thank you.
     
  11. May 4, 2021 at 1:33 PM
    #51
    Vlady

    Vlady Well-Known Member

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    Been there, done it.. ain't working on any available versions of tunes since October 2020. I bet yours is not working either. If you downshift to 4th somewhere between 70-80 mph, you will be stuck in 4th even you hit a level ground.
     
  12. May 4, 2021 at 1:36 PM
    #52
    dunlap837

    dunlap837 Well-Known Member

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    Incorrect. My truck will reliably and repeatably upshift from 4th to 5th at any speed, even travelling uphill. I accomplished this by tuning the transmission torque tables to my liking.
     
    Mrtacoman88 likes this.
  13. May 4, 2021 at 1:36 PM
    #53
    Bulletproofmafia

    Bulletproofmafia [OP] Well-Known Member

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    yeah thats my problem right now, its stuck in gear for miles on flat land and down hill....
     
  14. May 4, 2021 at 1:37 PM
    #54
    Bulletproofmafia

    Bulletproofmafia [OP] Well-Known Member

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    i would need this done for me as I am not savvy with tuning or creating tunes
     
  15. May 4, 2021 at 1:39 PM
    #55
    tonered

    tonered tacorider

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    First shot, try the unedited tune. You might be surprised.
     
    Mrtacoman88 likes this.
  16. May 4, 2021 at 1:44 PM
    #56
    Bulletproofmafia

    Bulletproofmafia [OP] Well-Known Member

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    perfect, I will try that, tonered are you able to hook me up with everything i need? and in the case i need the tune edited are you also able to get that done for me?
     
    Mrtacoman88 likes this.
  17. May 4, 2021 at 1:49 PM
    #57
    dunlap837

    dunlap837 Well-Known Member

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    You can expect to see a big improvement from the unedited base tune. Although those tunes do still allow for some level of learning, you may find you do not need any further custom editing. If you do, there are forum members offering tuning services who may do something custom for you.
     
  18. May 4, 2021 at 1:49 PM
    #58
    ktbell444

    ktbell444 As lost as a lieutenant during land nav

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    Depends on if you're local to him or not.
     
    Mrtacoman88 and tonered like this.
  19. May 4, 2021 at 1:55 PM
    #59
    the.sight.picture

    the.sight.picture Wishes he was in the woods.

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    Check out my build thread (Beginning of Money Pit)
    lemon law that bad boy
     
    Skydvrr likes this.
  20. May 4, 2021 at 1:56 PM
    #60
    tonered

    tonered tacorider

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    I'm just a forum monkey. @OVTune is the man.


    I do not share edited tunes.
     

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