1. Welcome to Tacoma World!

    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 Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

6 speed manual transmission noise?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by elrobbygtaco, Nov 24, 2022.

  1. Nov 24, 2022 at 9:57 PM
    #1
    elrobbygtaco

    elrobbygtaco [OP] Member

    Joined:
    Jan 21, 2020
    Member:
    #316864
    Messages:
    17
    Gender:
    Male
    First Name:
    Robby
    Vehicle:
    2.7L 2013 Toyota Tacoma 4x4
    Hey I am trying to diag a noise coming from my manual 6 speed transmission on an 06 trd off-road. The noise is heard in the cab when driving in gear. It’s a slight hum or grind that could be mistaken for your ac fan being on. When I move the shifter around I can change the pitch in the sound ever so slightly. At low speeds the sound is not so loud. It is loudest in 4th and 6th gear doing highway speeds. 5th gear is completely normal. I just put a new master cylinder in, bled it and changed my transmission oil. The noise was there before this work but has settled down a little after. But is still bugging me. Anyone out there have this problem? Tips or tricks? I’m thinking my synchros are maybe worn down or off. Lmk what you think. Thanks!
     
  2. Nov 24, 2022 at 10:04 PM
    #2
    sethstacoma

    sethstacoma Well-Known Member

    Joined:
    Sep 23, 2022
    Member:
    #406486
    Messages:
    89
    Gender:
    Male
    First Name:
    Seth
    Vehicle:
    2022 Toyota Tacoma TRD O/R 6spd manual.
    A hum or a grind? Two distinct different sounds.
     
  3. Nov 25, 2022 at 7:54 PM
    #3
    elrobbygtaco

    elrobbygtaco [OP] Member

    Joined:
    Jan 21, 2020
    Member:
    #316864
    Messages:
    17
    Gender:
    Male
    First Name:
    Robby
    Vehicle:
    2.7L 2013 Toyota Tacoma 4x4
    It’s not really much of a difference in this instance. If I had to pick one or the two I would say hum. And you can feel it through the shifter knob. So obviously deep down it’s a soft grind.
     
  4. Nov 25, 2022 at 7:59 PM
    #4
    sethstacoma

    sethstacoma Well-Known Member

    Joined:
    Sep 23, 2022
    Member:
    #406486
    Messages:
    89
    Gender:
    Male
    First Name:
    Seth
    Vehicle:
    2022 Toyota Tacoma TRD O/R 6spd manual.
    If its not grinding shifting into any gears I'd say syncros are working good, I've had gear boxes that had hum in certain gears at certain rpms. What transmission oil did you use and when you drained old out any unusual shavings come out?
     
  5. Nov 25, 2022 at 8:00 PM
    #5
    Littles

    Littles Stupid is as stupid does.

    Joined:
    May 14, 2014
    Member:
    #129837
    Messages:
    3,231
    Gender:
    Male
    First Name:
    Bryan
    Elizabeth, CO
    Vehicle:
    3 tons of fun
    Does the sound go away when you press the clutch? If so, then it's possible the throw out bearing is going.
     
  6. Nov 26, 2022 at 5:26 AM
    #6
    elrobbygtaco

    elrobbygtaco [OP] Member

    Joined:
    Jan 21, 2020
    Member:
    #316864
    Messages:
    17
    Gender:
    Male
    First Name:
    Robby
    Vehicle:
    2.7L 2013 Toyota Tacoma 4x4
    It’s not a throw out bearing. It only makes noise when it is in gear. And the noise goes away when In neutral or when the clutch is in. Also it does sometimes grind downshifting to 2nd or upshifting to 3rd under load. But I used 75w-90 gl4 royal purple gear oil. Ever since I installed the new master cylinder and trans oil. The noise has reduced and shifting has become much smoother. But it’s just this noise when in gear driving I can’t seem to understand.
     
  7. Nov 26, 2022 at 5:28 AM
    #7
    elrobbygtaco

    elrobbygtaco [OP] Member

    Joined:
    Jan 21, 2020
    Member:
    #316864
    Messages:
    17
    Gender:
    Male
    First Name:
    Robby
    Vehicle:
    2.7L 2013 Toyota Tacoma 4x4
    Starting to think I might have to just have a transmission expert take a look. It does have 150k on it and if it was driven rough it could just be time for new gears. Also no metal shavings when I did the trans oil. Everything appeared normal.
     
  8. Nov 26, 2022 at 6:16 AM
    #8
    sethstacoma

    sethstacoma Well-Known Member

    Joined:
    Sep 23, 2022
    Member:
    #406486
    Messages:
    89
    Gender:
    Male
    First Name:
    Seth
    Vehicle:
    2022 Toyota Tacoma TRD O/R 6spd manual.
    I've had a tacoma that had the hum in certain gears I say just drive it as long as it isn't grinding too often and fluid is good should be able to get another 100k or more just like it is.
     
  9. Nov 26, 2022 at 2:44 PM
    #9
    NBourque

    NBourque Well-Known Member

    Joined:
    Nov 6, 2011
    Member:
    #66564
    Messages:
    545
    Gender:
    Male
    First Name:
    Nick
    Maine
    Vehicle:
    ‘21 PRO
    My 6 speed has always whined in gear while moving. 207K miles.
     
    elrobbygtaco[OP] likes this.
  10. Nov 26, 2022 at 6:05 PM
    #10
    winkel

    winkel Well-Known Member

    Joined:
    Dec 24, 2015
    Member:
    #173039
    Messages:
    2,370
    Gender:
    Male
    Corydon, IN
    Vehicle:
    2014 Spruce Mica, TRD Off-Road, 6 Spd Manual
    Sliders, Tailgate Liner
    Mine used to whine in 4th, but it has quieted down in the last couple of years.
    I use Lucas mostly, but switched to Redline this last time. I'm at about 139,000 miles.
     
    elrobbygtaco[OP] likes this.
  11. Nov 10, 2023 at 7:31 PM
    #11
    Dirtytco

    Dirtytco Member

    Joined:
    Jun 13, 2022
    Member:
    #399340
    Messages:
    9
    Gender:
    Male
    First Name:
    Josh
    Vehicle:
    2016 MGM Offroad on Kings
    What did the master say about your trans?
     

Products Discussed in

To Top