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2003 Tacoma 2.7 4x4 humming/whine noice in transmission goes away when pressing the clutch

Discussion in '1st Gen. Tacomas (1995-2004)' started by Ikeatlien, Jan 14, 2022.

  1. Jan 14, 2022 at 5:42 PM
    #1
    Ikeatlien

    Ikeatlien [OP] Active Member

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    I have this whine humming noise coming from my transmission when I press the clutch it goes away and when I took foot off clutch it comes back when in gear 1,2 and 3 it makes a whine noise goes away on 4th and 5th I just changed the pull out bearing today noise is still there, anybody had this issue before or can help me out?? I’m posting a video with the noise

    Here is the video of the hum
    https://youtube.com/shorts/l9l3U9B00C0?feature=share
     
    Last edited: Jan 17, 2022
  2. Jan 16, 2022 at 11:10 AM
    #2
    Glamisman

    Glamisman Well-Known Member

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    I am thinking countershaft bearings but the noise in 5th makes me question my own diagnosis… I am not 100% sure of the power-flow through the gear stack in your trans. I am pretty positive that in 4th gear the countershaft is not in the power-flow. Gearcruncher knows this stuff in his sleep and I will defer to his knowledge.
     
  3. Jan 16, 2022 at 11:14 AM
    #3
    YotaGangYotaGang

    YotaGangYotaGang PreRunners are wannabe 4x4’s

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  4. Jan 16, 2022 at 11:15 AM
    #4
    jake72

    jake72 Well-Known Member

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    If you changed the throw out bearing, I would have changed the whole clutch.
     
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  5. Jan 16, 2022 at 11:52 AM
    #5
    Bivouac

    Bivouac Well-Known Member

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    How many miles on the transmission?

    The sound changes with RPM?

    Any problems with the transmission jumping out of gear?

    How was the old clutch release bearing when you removed it.

    The transmission was out did you feel any rough spots when you checked things out?
     
  6. Jan 16, 2022 at 1:17 PM
    #6
    Tour991

    Tour991 Supplier of used parts

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    Most likely it's the input shaft bearing in the transmission. I had the same issue on my 97. Drove it for about 5k with no issues. Easy fix is to just swap in a new transmission.
    You will have to tear apart the trans to replace the bearing.
     
  7. Jan 16, 2022 at 1:27 PM
    #7
    USMILRET

    USMILRET Tacoma Owner

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    I would rule out the pilot bearing and the throwout bearing before going to the transmission.
     
  8. Jan 16, 2022 at 1:31 PM
    #8
    Tour991

    Tour991 Supplier of used parts

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    If it was the pilot or the throw out bearings it would make noise in all 5 gears.
     
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  9. Jan 16, 2022 at 5:37 PM
    #9
    Ikeatlien

    Ikeatlien [OP] Active Member

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    Well tomorrow they are dropping that transmission again we already ruled out throw out bearing… throw out bearing seems it was in okay condition still but replaced any way checking pilot bearing and input shaft bearing tomorrow. I don’t have any slip or any other issues with tranny gears are smooth and shift with no issue truck has 220k miles
     
  10. Jan 16, 2022 at 5:45 PM
    #10
    Ikeatlien

    Ikeatlien [OP] Active Member

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  11. Jan 17, 2022 at 9:00 AM
    #11
    Ikeatlien

    Ikeatlien [OP] Active Member

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    car has 220k miles I bought it around a year ago and I’m sure tranny has the same miles. It shifts smooth no jumping head nothing just making whining noise here is the video please look at it throw out bearing was still in good condition but changed it anyways https://youtube.com/shorts/l9l3U9B00C0?feature=share
     
  12. Jan 17, 2022 at 12:30 PM
    #12
    Bivouac

    Bivouac Well-Known Member

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    Sounds can be tricky with my cheap speakers . I could not even hear any strange sounds .

    It might be a harmonic vibration not related to the drive train.

    I am guessing you were not around when the transmission was out and most likely no one checked it out
     
  13. Jan 17, 2022 at 1:10 PM
    #13
    Ikeatlien

    Ikeatlien [OP] Active Member

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    i was not around but mechanic is saying to just replace all the bearing and buying a kit.. these tacos have the w59 trans right?
     
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  14. Jan 18, 2022 at 7:49 AM
    #14
    Tour991

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    Yes it's a w59
     
  15. Jan 18, 2022 at 8:44 AM
    #15
    Ikeatlien

    Ikeatlien [OP] Active Member

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    One more question to change the input shaft bearing can I just change that out or do I have to pretty much take apart the tranny? Mechanic is saying it’s the input shaft bearing but has to take the whole think apart??
     
  16. Jan 21, 2022 at 8:25 PM
    #16
    Tour991

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    It needs to be taken apart.
     
  17. Jan 21, 2022 at 9:17 PM
    #17
    10thgrouptvet

    10thgrouptvet Member

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    Hard to tell from the video, but it sounds like the throwout bearing is rubbing on the clutch splines. That's why it sounds like grinding. One or more of the clutch splines could be bent, though that's not a common problem. Certainly check the pilot bearing and also make sure the clutch pressure plate is installed squarely and torqued. If a bolt is loose or grossly over-torqued, that can lead to splines that are not square to the throwout bearing--leading to the splines rubbing where it's angled highest. Anyway, it sounds like it's grinding so I think that's splines are continuing to touch the throwout bearing when clutch is fully engaged (foot off clutch). This could also be due to some small obstruction or corrosion that prevents the throwout bearing from fully disengaging when foot is off clutch. But I'd check the splines to see if any are protruding further than the others, but that could be very hard to determine without some precise instruments. Also remember that the issue I'm describing is typically noticeable when the throwout bearing is released (foot off clutch). When engaged, the pressure prevents vibrations a lot of the time. With a dry or worn throwout bearing it's typically the opposite and doesn't make noise until you press the clutch and it starts to spin.

    Finally, what (if anything) is coincidental to the noise? Did you go off road in gritty mud? Did you replace the clutch? Or, did it just gradually become noticeable?
     

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