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

“Bump” after 1st to 2nd shift

Discussion in '2.5 Gen Tundras (2014-2021)' started by sja17, Dec 18, 2017.

  1. Dec 18, 2017 at 7:50 PM
    #1
    sja17

    sja17 [OP] New Member

    Joined:
    Sep 16, 2017
    Member:
    #9689
    Messages:
    7
    Gender:
    Male
    Vehicle:
    2017 Tundra TSS Offroad White
    Hey all, I have about 6500 miles on my 17’ 4x4. From a complete stop when accelerating, I feel a bump right after the trans shifts from 1st to 2nd gear. Anyone else experience this and know what it is? Thanks for the help. Guessing it’s the slip yoke maybe?
     
    nmichtundra likes this.
  2. Dec 19, 2017 at 7:39 AM
    #2
    RussellVaughan

    RussellVaughan New Member

    Joined:
    Jul 27, 2016
    Member:
    #4010
    Messages:
    269
    Gender:
    Male
    Houston
    Vehicle:
    2015 Gray TSS 5.7 CM SR5 4x4
    AMP Research PowerSteps; Katzkin leather seats (Nightrunner, all black, no perf/logo); TRD 18" BBS Forged rims; Nitto Terra Grappler G2 LT295/70R18) tires; LT295/70R18 spare tire; Rough Country speedo calibrator; Fox 2.0 IFP front & rear w/1" leaf blocks; TRD PRO black headlamps w/Headlight Revolution harness; TRD PRO grill w/color match hood bulge; RCI engine skid plate; BakFlip MX4 tonneau; Baja Design Squadron Sport fog lights w/clear wide lens; front/rear color match bumper covers; K&N CAI; Pedal Commander throttle controller w-trailer brake bezel; SE Toyota wireless charger tray; VLEDS interior and exterior LED lights; AJT Designs interior chrome delete; Sparks Parts driver side grab handle kit; Pop&Lock tailgate lock; ICS Fab dash mount w/support plate; ICS Fab center console mount; SNS Custom Design ABS sensor guards; TRD PRO shift knob; Undercover Swingcase bed storage; Rad Rubber Design engine splash guards; Bull Ring bed rail tie-downs; exterior debadge w/black & engine badge and black 4x4 badge; Charvonia Design billet bed tie-down anchors; rear console USB port; TRD rear sway bar; Fumoto Oil Pan Valve; Toyota metal oil filter assembly; Vexing R1 dash cam; X2Power 24F Battery.
    if it's easy to replicate, i would take it to the dealer since it's under warranty.
     
  3. Dec 19, 2017 at 7:56 AM
    #3
    Brimaster

    Brimaster New Member

    Joined:
    Sep 24, 2017
    Member:
    #9871
    Messages:
    88
    Gender:
    Male
    Vehicle:
    2017 Magnetic Gray Metallic DC TRD
    I have just over 3,000 and when I go from a stop and then back off from the accelerator I have experienced the same thing. I do not think anything is wrong just something that happens when certain conditions are right in the drivetrain.
     
    TTund16 likes this.
  4. Dec 19, 2017 at 8:05 AM
    #4
    Law323

    Law323 it’s only weird if you make it weird

    Joined:
    Apr 7, 2016
    Member:
    #3081
    Messages:
    9,888
    Gender:
    Male
    First Name:
    Law
    Baton Rouge, La
    Vehicle:
    2012 4.6 L MGM DC
    Toytec BOSS suspension lift @ 3" (front) Toytec BOSS remote resi's (back) 1" Toytec block (rear) 275/70r18 Toyo AT2 Info system mod 3D MAXpider Kagu floor mats LED interior lights 50% ceramic tint front windows 35% ceramic tint windshield brow Bed mounted YETI bottle opener Paracord wrapped oh Sh!t bars 3" stubby antennae TRD sway bar Upcoming: LED backup lights OEM Backup camera Iron Cross Patriot step bars Trifold or roll up tonneau cover
    Does it happen every time? If not, it may just be the tranny catching or abs sensor
     
  5. Dec 19, 2017 at 8:41 AM
    #5
    Brimaster

    Brimaster New Member

    Joined:
    Sep 24, 2017
    Member:
    #9871
    Messages:
    88
    Gender:
    Male
    Vehicle:
    2017 Magnetic Gray Metallic DC TRD
    For me it is just once and a while and like you said figured just a sensor or something just freaks out when specific conditions happen to be present.
     
  6. Dec 19, 2017 at 8:46 AM
    #6
    Law323

    Law323 it’s only weird if you make it weird

    Joined:
    Apr 7, 2016
    Member:
    #3081
    Messages:
    9,888
    Gender:
    Male
    First Name:
    Law
    Baton Rouge, La
    Vehicle:
    2012 4.6 L MGM DC
    Toytec BOSS suspension lift @ 3" (front) Toytec BOSS remote resi's (back) 1" Toytec block (rear) 275/70r18 Toyo AT2 Info system mod 3D MAXpider Kagu floor mats LED interior lights 50% ceramic tint front windows 35% ceramic tint windshield brow Bed mounted YETI bottle opener Paracord wrapped oh Sh!t bars 3" stubby antennae TRD sway bar Upcoming: LED backup lights OEM Backup camera Iron Cross Patriot step bars Trifold or roll up tonneau cover
    yeah, mine bumps every once in a while. Sometimes it's more noticeable than others like when I stop and boom i feel it. Almost raises my heart rate, but after driving a mile or so with no problems or foreign feels/noises, i forget about it.
     
  7. Dec 19, 2017 at 9:53 AM
    #7
    Tundra X

    Tundra X NIGHTRUNNER

    Joined:
    Sep 20, 2017
    Member:
    #9778
    Messages:
    3
    Gender:
    Male
    First Name:
    Jr
    Dallas
    Vehicle:
    2017 Black SR5 CM
    TRD Pro Grille, ICI Magnum Rear Bumper, Predator Style Step Bars, Vinyl wrapped front bumper caps, Spyder LED headlights, BFG 275.65/R20, Rough Country 3in. font lift, Coachbuilder +2 Shackles, Fox 2.0 rear shocks.
    Yup, I have 2017 CM SR5 and I've noticed it happens when I decelerate every once in a while. Scared me at first
     
  8. Dec 19, 2017 at 10:13 AM
    #8
    blizz86

    blizz86 New Member

    Joined:
    Apr 13, 2016
    Member:
    #3120
    Messages:
    562
    Gender:
    Male
    I think what you're talking about is just a little bit of play in the drivetrain.. i wouldnt call what i experience i bump though.. its just the AT upshifting when you give a little gas from coasting or when it already downshifted.
     
    TTund16 likes this.
  9. Dec 20, 2017 at 10:16 AM
    #9
    Rhubarb Johnson

    Rhubarb Johnson New Member

    Joined:
    Sep 21, 2017
    Member:
    #9793
    Messages:
    100
    First Name:
    Rhubarb
    Vehicle:
    '17 TRD Pro Dbl Cab; Barc Red
    New windshield wipers....just getting started
    I've noticed when I slow to about 5mph then accelerate it bumps a bit, but I believe it's trying to start in second gear. Doesn't happen from a full stop, though.

    Isn't the drive train warrantee to 60k?
     
  10. Dec 20, 2017 at 7:33 PM
    #10
    sja17

    sja17 [OP] New Member

    Joined:
    Sep 16, 2017
    Member:
    #9689
    Messages:
    7
    Gender:
    Male
    Vehicle:
    2017 Tundra TSS Offroad White
    Mine does it randomly from a stop. Depends on the throttle input, if I get down on it I don’t feel it. If I moderately accelerate I feel it. It also seems to be effected by the incline of the road. It never does it while turning. I also notice it slowing down, like when I pull in my garage which is uphill a little. I’ll give the gas a bump to get up the hill and when I hit the brakes once in the garage it does it sometimes. From what I’ve read it seems to be from the slip yoke in the middle of the driveshaft. Just wondering if it may be out of spec and needs taking in or if it’s just normal for it to be that way.
     
    TTund16 likes this.
  11. Dec 20, 2017 at 8:41 PM
    #11
    Borgs

    Borgs New Member

    Joined:
    Mar 31, 2017
    Member:
    #7050
    Messages:
    1,753
    Gender:
    Male
    PA
    Vehicle:
    2017 Limited Crew TRD Off-Road
    Pro Grill and Bulge TRD sway BAK MX4 Tonneau
    Does it happen at 15mph? If so, probably abs sensor.
     
  12. Dec 21, 2017 at 1:48 AM
    #12
    rodm1

    rodm1 New Member

    Joined:
    Aug 5, 2017
    Member:
    #8916
    Messages:
    147
    Gender:
    Male
    I think its the LSD because I've noticed some slip where the light never come on or just blinked.

    Maybe a systems test?
     
  13. Dec 28, 2017 at 10:32 AM
    #13
    sja17

    sja17 [OP] New Member

    Joined:
    Sep 16, 2017
    Member:
    #9689
    Messages:
    7
    Gender:
    Male
    Vehicle:
    2017 Tundra TSS Offroad White
    After paying more attention the past week, it only does it when cold. After driving a few miles, it goes away. I'm convinced it's something to do with the driveshaft.
     
  14. Dec 28, 2017 at 12:23 PM
    #14
    T-Rex266

    T-Rex266 Independentoffroad who? That's cute. Staff Member

    Joined:
    Jan 5, 2014
    Member:
    #6
    Messages:
    55,333
    Gender:
    Male
    It’s probably the transmission fluid just warming up. When it’s at operating temp, it will shift smoother. Same goes for my Corolla.
     
  15. Nov 30, 2019 at 1:10 PM
    #15
    nmichtundra

    nmichtundra New Member

    Joined:
    Nov 30, 2019
    Member:
    #39336
    Messages:
    12
    Gender:
    Male
    Just purchased used 2015 Tundra 1794 Edition 4x4 w/ 72,000 miles over the summer and have also been noticing this "bump" "late shift" "delayed" type of jolt behavior, from 1st to 2nd, when the truck is cold. Located here in Southern California, I only drive 10 miles to work and 95% of the time the truck is not in any extreme temperatures - with that being said I feel this "bump" from 1st to 2nd daily on my drive to work, it's really annoying and makes the transmission feel clumsy for that first bit of driving. I'm coming from a 2003 Tacoma that shifted like butter.

    (when the truck is cold) If you accelerate really slow, you don't feel it. If you accelerate really fast, you only kind of feel it.. If you accelerate at a "normal" rate of speed - YOU FEEL THIS BUMP :(

    For a tech to really notice this "bump" from 1st to 2nd you will have to drop your truck off the night before they perform the test drive. I've taken mine in twice now and they "can't feel anything"... because the truck is already up to ideal operating temps ... . So my THIRD time bringing the truck in I'll leave it over night, and yes, I feel they will tell me exactly what I already know... something about "getting up to optimal temps etc" ...

    If anyone has figured this out let us know! Other than that, for the time I guess I'll accept it's kind of annoying to drive for the first bit of the ride hahahah
     
  16. Nov 30, 2019 at 1:41 PM
    #16
    TTund16

    TTund16 New Member

    Joined:
    Jan 3, 2017
    Member:
    #5798
    Messages:
    853
    Gender:
    Male
    I don't think it's a real problem just a heavy duty trans shifting ... I feel a bump sometimes but when I am uphill at a stop sign and then start moving again sometimes it feels like it wants to take off and there is quick and short surge (bump?) and then back to normal ... Like someone said maybe it is still in 2nd gear (California rolling vs. full stop) and then changes its mind and shifts to 1st.

    In your case (72K miles) if it's doing it all the time maybe time for fresh trans fluid. Unless you have the car history.
     
  17. Nov 30, 2019 at 1:46 PM
    #17
    14burrito

    14burrito IG @14burrito

    Joined:
    Dec 14, 2014
    Member:
    #798
    Messages:
    3,315
    Vehicle:
    2014 SR5 CM 4x4 5.7
    @ADSracingshocks - F 3 point ohh / R 2.5 - w/clickers @camburgracing - uniball UCA @rigidindustries - 40" amber/white split, Dually XL, D2 @coopertires - 35/12.5/17 STT MAXX @bayareametalfab - low pro bed rack @toyotausa - 17" rock warrior @sdhqoffroad - rock sliders, a-pillar @hondogarage / @apple / @gaiagps / @dualgps- navigation @wheelersoffroadinc - superbumps
    Random thought,
    Try greasing the u-joints and tell me if the problem persists.

    I notice something similar if I go too long between greasing u-joints. I think they went away from jerks on the MY19.

    Worth the 10min to try.
     
  18. Dec 14, 2019 at 6:27 PM
    #18
    Scuba

    Scuba Sober member

    Joined:
    Oct 13, 2018
    Member:
    #20508
    Messages:
    1,248
    Gender:
    Male
    Austin, Tx.
    Vehicle:
    2012 Texas Edition CM.
    I felt the 1-2 bump tonight with moderate throttle leaving a stoplight.

    I've got fresh fluid in my trans and it's at the correct level. By all other means I think my truck and transmission is in fantastic shape. I don't think it's a problem at all.
    Could it be axle wrap? Maybe. Don't think so, though.
     
    OR18TRD likes this.
  19. Jan 7, 2021 at 5:54 AM
    #19
    memario1214

    memario1214 Hotshot Offroad Staff Member Vendor

    Joined:
    Dec 13, 2015
    Member:
    #2252
    Messages:
    660
    Gender:
    Male
    First Name:
    Colton
    Missoula, MT
    Vehicle:
    '21 Limited MGM CrewMax
    Add another one (a '21 here) to this list. Upon startup the VERY FIRST shift from 1-2 has a noticeable thump that I can feel in my foot. However, after that... Nothing. Feel nothing at even the first stopsign I see about 75 yards away.

    I am wondering if it's normal, but it certainly makes a guy scratch his head on a new rig.
     
  20. Jan 7, 2021 at 7:06 AM
    #20
    Cpl_Punishment

    Cpl_Punishment Mother-Loving Member

    Joined:
    Jan 24, 2019
    Member:
    #25048
    Messages:
    6,561
    Gender:
    Male
    First Name:
    Rosy
    Alberta, Canada
    Vehicle:
    2020 MGM SR5 CM 4X4
    Are you sure it's not the ABS self check?
     
  21. Jan 7, 2021 at 7:09 AM
    #21
    memario1214

    memario1214 Hotshot Offroad Staff Member Vendor

    Joined:
    Dec 13, 2015
    Member:
    #2252
    Messages:
    660
    Gender:
    Male
    First Name:
    Colton
    Missoula, MT
    Vehicle:
    '21 Limited MGM CrewMax
    Pretty positive. :notsure: I know that one! I remember it being an odd noise on my Tacoma when I first got it.

    I suppose it's possible, but unlikely! Suppose I could kill the ABS to test that theory though.
     
    Cpl_Punishment likes this.
  22. Jan 7, 2021 at 7:11 AM
    #22
    Pine Tree State

    Pine Tree State New Member

    Joined:
    Dec 15, 2020
    Member:
    #56201
    Messages:
    186
    Gender:
    Male
    Vehicle:
    2021 SR5 TRD Sport CM
    Mine does the same thing, and its not the same as what you feel on the Tacoma. I had an 18 Taco and this thump is different that what I had on the Taco. I think it is the ABS like others have said.
     
    LS3 likes this.
  23. Jan 7, 2021 at 7:12 AM
    #23
    Cpl_Punishment

    Cpl_Punishment Mother-Loving Member

    Joined:
    Jan 24, 2019
    Member:
    #25048
    Messages:
    6,561
    Gender:
    Male
    First Name:
    Rosy
    Alberta, Canada
    Vehicle:
    2020 MGM SR5 CM 4X4
    I haven't noticed anything like this on mine but it seems to hold gears longer when I first get going, maybe to help avoid the thump. Maybe they changed the shift behaviour for 2021 looking for better fuel economy? I wonder if your dealership would do anything useful if you brought it in.
     
  24. Jan 7, 2021 at 7:23 AM
    #24
    memario1214

    memario1214 Hotshot Offroad Staff Member Vendor

    Joined:
    Dec 13, 2015
    Member:
    #2252
    Messages:
    660
    Gender:
    Male
    First Name:
    Colton
    Missoula, MT
    Vehicle:
    '21 Limited MGM CrewMax
    Okay at least I'm not losing it. Yeah, it's definitely a more physical response. However, the ABS check seems like a logical thought given that there's nothing here aside from that very first shift. Appreciate the input.
    Well... With the ringer that this poor truck will ultimately go through the fuel economy is the least of my concerns. :laugh: If what is occurring isn't indicative of premature wear or failure I'll be a happy camper here.
     
    Cpl_Punishment likes this.
  25. Jan 7, 2021 at 12:13 PM
    #25
    TTund16

    TTund16 New Member

    Joined:
    Jan 3, 2017
    Member:
    #5798
    Messages:
    853
    Gender:
    Male
    bump or thump or clunk or a jolt? :D

    I called my observation in post #16 a "bump" but to be clear it doesn't make any sound when it does that. Maybe I should have called it a jolt instead. I only feel a little jolt and sometimes only at a stop sign (read my post #16) and going uphill.

    Do you guys hear a sound when this happens?
     
  26. Jan 7, 2021 at 12:38 PM
    #26
    Raidercat

    Raidercat New Member

    Joined:
    Sep 25, 2019
    Member:
    #36634
    Messages:
    45
    Gender:
    Male
    First Name:
    Chris
    Vehicle:
    2019 Tundra 1794
    My 19 does this only when cold and light pressure on the pedal. Has done this since day 1 of ownership.
     
  27. Jan 7, 2021 at 12:46 PM
    #27
    Johnsonman

    Johnsonman New Member

    Joined:
    Nov 25, 2019
    Member:
    #39132
    Messages:
    790
    Gender:
    Male
    Austin
    Vehicle:
    Sequoia
    LED headlamps/fogs; interior footlamps.
    Based on descriptions, sounds like what I calla 'firm' shift.

    I would much rather have a 'firm' 1-2 than a squishy one!!

    What say everyone, firm shifts or not?
     
    TTund16 likes this.
  28. Jan 7, 2021 at 6:21 PM
    #28
    TTund16

    TTund16 New Member

    Joined:
    Jan 3, 2017
    Member:
    #5798
    Messages:
    853
    Gender:
    Male
    yes, firm shift and no sound.
     

Products Discussed in

To Top