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06 manual third gear grind

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Bm@StAugbeach, Oct 19, 2020.

  1. Oct 19, 2020 at 12:26 PM
    #1
    Bm@StAugbeach

    Bm@StAugbeach [OP] Member

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    06 Tacoma TRD off Road manual 6speed shifting into third gear grinds? Put new clutch in couple years ago.
     
  2. Oct 19, 2020 at 12:27 PM
    #2
    whatstcp

    whatstcp Professional incoherent spammer

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    Throw some mt90 in there and see if it helps. Make sure the clutch is bled and free of air. Slow down on shifts
     
    Taco*Sauce06 and Strictlytoyz like this.
  3. Oct 19, 2020 at 12:39 PM
    #3
    Jimmyh

    Jimmyh Well-Known Member

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    Or a worn syncro gear.
     
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  4. Oct 19, 2020 at 1:18 PM
    #4
    azzwethinkweiz

    azzwethinkweiz Well-Known Member

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    I'd start by changing your MTF first. I purchased my truck with about only 30k miles on it, it was on OEM fluid still and it would often grind or feel notchy especially when it was cold and 3rd gear seemed to be the worst. I was gonna go the MT90 route but ended up putting in fords synthetic MTF. The nice thing is you can get it locally at your ford dealer but it is more expensive than some other options. Have had mine in there for about 80k and I can say it got rid of any notchy or grinding feeling issues even when cold and it is still working great.

    This is the stuff I'm talking about:
    https://www.truckid.com/motorcraft/...ennCIOyTKMhqE-Jkuzu9c6y5XpVxjTt0aAqFSEALw_wcB

    Amazon also carries it if that's your thing:
    https://www.amazon.com/Genuine-Ford-XT-M5-QS-Synthetic-Transmission/dp/B000NUES82

    I hear Redline MT90 does work great too but I haven't used it.
     
  5. Oct 19, 2020 at 2:37 PM
    #5
    Bm@StAugbeach

    Bm@StAugbeach [OP] Member

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    Yes when it’s a little cooler out or when I first run her she tends to grind going into 3rd gear. I’ll have to try it. Thanks so much y’all!
     
  6. Nov 11, 2020 at 1:44 PM
    #6
    Bm@StAugbeach

    Bm@StAugbeach [OP] Member

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    Not sure what that is? Can you explain. Toyota said you may need to replace transmission if it keeps getting worse.
     
  7. Nov 11, 2020 at 3:10 PM
    #7
    Gen2 Man

    Gen2 Man Well-Known Member

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    Mine had same problem and I dumped the oil. Replaced with Redline MT 90 and the problem went away. Needless to say I am pleased.
     
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  8. Nov 11, 2020 at 4:00 PM
    #8
    Jimmyh

    Jimmyh Well-Known Member

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    It speed matches the gears while shifting gears so that it doesn't grind.

    https://www.youtube.com/watch?v=nM4CuWlnJY0
     
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  9. Nov 12, 2020 at 6:58 AM
    #9
    Bm@StAugbeach

    Bm@StAugbeach [OP] Member

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    Jimmyh likes this.
  10. Nov 12, 2020 at 11:25 AM
    #10
    DiscoYaker

    DiscoYaker Well-Known Member

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    Stock for now.. maybe
    Great share.. really helps with a person like me to understand how things work. Im a visual/hands on learner.
     
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  11. Nov 12, 2020 at 1:51 PM
    #11
    tak1313

    tak1313 Well-Known Member

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    Try double clutching 3rd. If it doesn't grind, likely the synchro is gone. I had a manual ranger that had the 2nd gear synchro go out without notice/warning. Just stopped working when I got off the highway. I just double clutched 2nd for about a year and a half until I got rid of it (and got my new to me 2013 base Taco). Wasn't worth fixing/replacing since it had 290K at that point.
     
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  12. Nov 12, 2020 at 2:19 PM
    #12
    Marc70

    Marc70 Well-Known Member

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  13. Nov 12, 2020 at 3:16 PM
    #13
    DiscoYaker

    DiscoYaker Well-Known Member

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    Stock for now.. maybe
  14. Nov 12, 2020 at 5:51 PM
    #14
    TacoTuesday1

    TacoTuesday1 Well-Known Member

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    MT90 is probably not the best. I have it and am not satisfied.
    It's just overhyped and people repeat what they hear. It is easy for the average enthusiast who doesn't know how to drive to buy it and then pretend it's awesome. They don't know the difference.

    It's the same in the Audi world with Motul Gear 300. Also a synthetic 75w90. That is not that good.
    The few folks over there with half a brain all ended up eventually switching to something thinner/lighter like 75w80 for better synchro operation. And given that most manual transmissions only need to operate synchros, 75w80 probably works fine. Unlike a hypoid gear open rear diff or whatever, that may need strong gear oil only.
     
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  15. Nov 12, 2020 at 8:12 PM
    #15
    whatstcp

    whatstcp Professional incoherent spammer

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    True

    Supertech it is then
     
  16. Nov 12, 2020 at 8:27 PM
    #16
    Strictlytoyz

    Strictlytoyz Well-Known Member

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    This ^ and if that don't fix it its your synchros. I had a bad 3rd gear grind and mt90 made it dissapear
     
  17. Nov 12, 2020 at 11:10 PM
    #17
    TacoTuesday1

    TacoTuesday1 Well-Known Member

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    Worth mentioning that 75w80 was Fuchs Titan SintoFluid of some sort I believe, maybe their SAE version
    there's a lot to pick from, both specific oil and different brands
    they may also have different viscosities in practice
    for example on motor oil, usually you can find a spec sheet on it. With stuff like HTHSV. High temp shear viscosity or whatever. And it will be different with different oils, even if both of them are "5w40" for example.
     
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