1. Welcome to Tundras.com!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tundra discussion topics
    • Transfer over your build thread from a different forum to this one
    • Communicate privately with other Tundra owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Transmission question

Discussion in '2.5 Gen Tundras (2014-2021)' started by Eaganite, Sep 13, 2020.

  1. Sep 13, 2020 at 6:03 AM
    #1
    Eaganite

    Eaganite [OP] New Member

    Joined:
    Apr 5, 2020
    Member:
    #44669
    Messages:
    393
    Gender:
    Male
    First Name:
    Gary
    Eagan, Minnesota
    Vehicle:
    2020 Limited TRD
    I bought my truck in March and I am very happy with it, but one thing I've noticed it does sometimes that makes me a little nervous. My driveway is about 50 feet long and somewhat steep, when pulling into my garage I slowly accelerate up hill then when entering my garage I let up on the gas pedal and it's like a little jerk or bump? Kind of hard for me to explain it but maybe almost like a transmission shift when letting up on the gas pedal, although I would expect it in first gear already? Other than this the power train seems to work great.

    I've been wondering about this for a while now, so its time to post to this huge knowledge base that's this forum.
     
  2. Sep 13, 2020 at 6:24 AM
    #2
    timsp8

    timsp8 Former Tundra owner for 13 years

    Joined:
    May 11, 2018
    Member:
    #15231
    Messages:
    3,524
    Gender:
    Male
    First Name:
    Tim
    NY
    Vehicle:
    2018 Tundra Limited Crewmax - Traded In
    Do you have any lift or anything? Doesn’t look like it from your profile picture. Does it do it anywhere else? It could be tension in your drivetrain that gets released at the top when you let up on the flat part. Some people say their trucks get a bump like they were rear ended at a red light and the common answer seems to be tension in the drivetrain.
     
  3. Sep 13, 2020 at 6:25 AM
    #3
    Rex Kramer

    Rex Kramer Vinyl Spinner

    Joined:
    Apr 9, 2017
    Member:
    #7181
    Messages:
    6,620
    Gender:
    Male
    Georgia
    Vehicle:
    2002 4.7L RCLB 4X4 2007 5.7L RCSB 4X2
    Drop it into S-4 and see if it still happens.
     
  4. Sep 13, 2020 at 6:45 AM
    #4
    TundraMcGov.

    TundraMcGov. Your friend. Your foe. Not yo Ho.

    Joined:
    Nov 23, 2018
    Member:
    #22089
    Messages:
    2,134
    Gender:
    Male
    First Name:
    Jofus
    Burpinham, Babalama
    Vehicle:
    2017 Super White DC 4X4 Tundra
    I'm gathering that your driveway is steep UPWARDS. When pulling into your driveway is your approach direction downhill, then turning into the driveway and changing direction to now go uphill?
     
  5. Sep 13, 2020 at 6:55 AM
    #5
    Eaganite

    Eaganite [OP] New Member

    Joined:
    Apr 5, 2020
    Member:
    #44669
    Messages:
    393
    Gender:
    Male
    First Name:
    Gary
    Eagan, Minnesota
    Vehicle:
    2020 Limited TRD
    The truck is stock, SumoSprings installed but that shouldn't make any difference. I haven't noticed anything odd anywhere else, and it could be described as a bump I suppose. I'll try S-4 and see, although it seems if I'm light on the accelerator when entering the garage I don't notice it more so if under a little higher load.
     
    Rex Kramer likes this.
  6. Sep 13, 2020 at 7:04 AM
    #6
    timsp8

    timsp8 Former Tundra owner for 13 years

    Joined:
    May 11, 2018
    Member:
    #15231
    Messages:
    3,524
    Gender:
    Male
    First Name:
    Tim
    NY
    Vehicle:
    2018 Tundra Limited Crewmax - Traded In
    That sounds to me like tension in the drivetrain somewhere getting released at the top when you change angle and throttle.
     
  7. Sep 13, 2020 at 7:04 AM
    #7
    Eaganite

    Eaganite [OP] New Member

    Joined:
    Apr 5, 2020
    Member:
    #44669
    Messages:
    393
    Gender:
    Male
    First Name:
    Gary
    Eagan, Minnesota
    Vehicle:
    2020 Limited TRD
    I generally enter in the direction that has the street somewhat uphill then my driveway is much steeper uphill witch has me using the accelerator harder till I start to enter the garage then when letting up I'll feel the "bump"?

    If I go easy on the entry and have less letup on the pedal I won't even notice anything unusual, just a smooth transition in.
     
  8. Sep 13, 2020 at 7:05 AM
    #8
    timsp8

    timsp8 Former Tundra owner for 13 years

    Joined:
    May 11, 2018
    Member:
    #15231
    Messages:
    3,524
    Gender:
    Male
    First Name:
    Tim
    NY
    Vehicle:
    2018 Tundra Limited Crewmax - Traded In
    Have you tried backing in to see if it makes a difference?
     
  9. Sep 13, 2020 at 7:11 AM
    #9
    Eaganite

    Eaganite [OP] New Member

    Joined:
    Apr 5, 2020
    Member:
    #44669
    Messages:
    393
    Gender:
    Male
    First Name:
    Gary
    Eagan, Minnesota
    Vehicle:
    2020 Limited TRD
    Well yes I have backed in on occasion, but generally its a slower process and I haven't noticed anything. I will have to try backing in more abruptly and see what happens.

    Thanks for all the input, much appreciated.
     
  10. Sep 13, 2020 at 7:32 AM
    #10
    socaltundra951

    socaltundra951 Gentlemen Prefer Black Tundras

    Joined:
    Jun 19, 2019
    Member:
    #32150
    Messages:
    254
    Gender:
    Male
    Southern California
    Vehicle:
    Black CrewMax 5.7
    In my experience this transmission has always felt a bit clunky during low speed maneuvers like that. Just gotten used to it, I guess.
     
  11. Sep 13, 2020 at 7:39 AM
    #11
    TundraMcGov.

    TundraMcGov. Your friend. Your foe. Not yo Ho.

    Joined:
    Nov 23, 2018
    Member:
    #22089
    Messages:
    2,134
    Gender:
    Male
    First Name:
    Jofus
    Burpinham, Babalama
    Vehicle:
    2017 Super White DC 4X4 Tundra
    Does your Tundra have the factory tow package on it? And the 4.30 axle ratio?
     
  12. Sep 13, 2020 at 8:08 AM
    #12
    Eaganite

    Eaganite [OP] New Member

    Joined:
    Apr 5, 2020
    Member:
    #44669
    Messages:
    393
    Gender:
    Male
    First Name:
    Gary
    Eagan, Minnesota
    Vehicle:
    2020 Limited TRD
    Yes to both, and TRD off road package.
     
  13. Sep 13, 2020 at 8:26 AM
    #13
    TundraMcGov.

    TundraMcGov. Your friend. Your foe. Not yo Ho.

    Joined:
    Nov 23, 2018
    Member:
    #22089
    Messages:
    2,134
    Gender:
    Male
    First Name:
    Jofus
    Burpinham, Babalama
    Vehicle:
    2017 Super White DC 4X4 Tundra
    I have the tow package and 4.30 axle ratio. Commonly when gently approaching, at a slow speed, a slow speed incline (your driveway) the truck will pull it in 2nd gear at first and then as the load increases will dump down into 1st gear ("granny low" to use an old timers term) which could be what you're experiencing.
     
  14. Sep 13, 2020 at 9:00 AM
    #14
    Eaganite

    Eaganite [OP] New Member

    Joined:
    Apr 5, 2020
    Member:
    #44669
    Messages:
    393
    Gender:
    Male
    First Name:
    Gary
    Eagan, Minnesota
    Vehicle:
    2020 Limited TRD
    I understand what your saying but this happens when letting off of the gas. I suspect the truck is already in first gear, but maybe I need to try a complete stop at bottom of driveway to make sure its in low gear.

    I can relate to the "granny low" being somewhat an old timer myself.
     
  15. Sep 13, 2020 at 9:22 AM
    #15
    CaptainGrumpus

    CaptainGrumpus The Mailman

    Joined:
    Mar 6, 2020
    Member:
    #43588
    Messages:
    1,175
    Gender:
    Male
    First Name:
    Matt
    Maine
    Vehicle:
    2018 Inferno Tundra TRD
    I have experienced the same thing when slowly maneuvering sometimes. Never really gave it much thought because I figured it was just the drivetrain adjusting.
     
  16. Sep 13, 2020 at 2:08 PM
    #16
    Eaganite

    Eaganite [OP] New Member

    Joined:
    Apr 5, 2020
    Member:
    #44669
    Messages:
    393
    Gender:
    Male
    First Name:
    Gary
    Eagan, Minnesota
    Vehicle:
    2020 Limited TRD
    I want to thank you all for your thoughts, this truly is a great forum with many helpful members.

    I have been thinking about this and was just returning from a grocery run. When I stopped at the corner (two houses away from mine) I put the tranny in S-1 then drove up my drive way, upon entering my garage and letting up on the gas there was no jerk or bump felt. Although I need to do more experimenting this has me thinking maybe I've usually been in 2nd gear going up my driveway then when letting up on the gas and tranny shifts to first gear. That would explain the jerk or bump I've been feeling
     
    Johnmatrix likes this.
  17. Sep 13, 2020 at 2:52 PM
    #17
    nopsFU

    nopsFU New Member

    Joined:
    Nov 25, 2019
    Member:
    #39133
    Messages:
    73
    Vehicle:
    2019 Tundra TRD Pro
    Same thing in my truck. It goes up the driveway in second gear then right before I stop at the top it downshifts to first with an annoying bump. I consider it normal but I don't like it. One of the few things that my old Nissan did better, transmission calibration.
     
    Johnmatrix likes this.
  18. Sep 13, 2020 at 8:07 PM
    #18
    Dragracer_Art

    Dragracer_Art New Member

    Joined:
    Jul 19, 2020
    Member:
    #49576
    Messages:
    746
    Gender:
    Male
    Dawsonville, GA
    Vehicle:
    2020 Crewmax 4x4
    5100's/+2.5" Eibachs, 18x9 +25 Methods,37x12.5 BFG KM3's
    This is what it feels like to me exactly.
    OP's issue is identical to my experience under same conditions.
    Feels like its stuck in 2nd gear and struggles up the driveway until dropping to 1st.
    Its annoying as hell.
     
    specter208 likes this.
  19. Sep 14, 2020 at 2:27 PM
    #19
    specter208

    specter208 New Member

    Joined:
    Sep 20, 2017
    Member:
    #9782
    Messages:
    221
    Gender:
    Male
    Vehicle:
    2017 Tacoma and 2005 Tundra RGCAB
    Sounds like a harsh downshift to 1st gear. Allison automatic do the same thing.
     
  20. Jun 2, 2023 at 2:03 AM
    #20
    TomSelleckstash08

    TomSelleckstash08 New Member

    Joined:
    Apr 30, 2023
    Member:
    #96316
    Messages:
    3
    Gender:
    Male
    First Name:
    Colby
    Vehicle:
    2008 white Tundra
    35's custom exhaust 3inch lift
    Mine has been doing the same exact thing. I've been thinking my transmission is going out or something because it only happens on steep inclines. I've actually got appointment in the morning at transmission shop
     

Products Discussed in

To Top