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  1. #1
    RC Enthusiast
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    Xmaxx pinion always loose, true??

    Hi all, bought the 10th scale maxx 2 weeks ago and enjoying every run.

    Decided to go for bigger brother Xmaxx. However saw couple of videos and reviews, some are having serious issues to pinion gear getting loose each and every run?! Even tried Blue and Red threadlock also having the same loosen pinion.

    Please advice if anyone face the same issues and is there any permanent solution for it? I don't wish the pinion loosen every runs and spoil the fun of the huge maxx!

  2. #2
    RC Racer Bigtim29's Avatar
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    Apr 2019
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    Iíll be honest, I use blue thread locker still. I just tighten that grub screw down as hard as I possibly can.


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  3. #3
    RC Competitor
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    Mar 2021
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    The motor gets hot, then softens the thread lock, then pinion slips. Keep your motor temps in check.

  4. #4
    RC Champion Acidic01's Avatar
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    The fix is mark here the grub screw sits then the drill. Small divot into the motor shaft.

    Only a handful have had this issue. I have not.

    It may be where the stock motor shaft were slightly tapered due to manufacturing issues.

    Sent from my Pixel 3 XL using Tapatalk

  5. #5
    RC Qualifier
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    Of course thereís the ultimate fix......

    https://wforccustoms.com/products/ultimate-combo-kit

  6. #6
    RC Qualifier
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    After about 2 years I started having this issue.

    Marked the position of the grub screw, clamped the shaft with some vice grips, and used a dremel cut off wheel to make a series of grooves in that area.

    Hasnít budged since.


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  7. #7
    RC Competitor
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    Dec 2020
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    Bedford, NH
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    FWIW, I was paranoid about checking everything on my X-Maxx when I received it, as I had been scared to death with all the "disaster first-time-out" videos about the X-Maxx online. I checked my pinion (along with everything else) and found it tight.

    It has not loosened for me at all, even though I've only been able to drive it a handful of times, so far.

    smp
    Stephen

    Traxxas XMaxx 8S (orange)

  8. #8
    RC Qualifier ThatTraxxas's Avatar
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    Jan 2021
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    I would get the arrma pinion from an outcast 8s.
    1/16 E-Revo VXL, Bandit XL-5 Just Gonna Send It!!

  9. #9
    RC Enthusiast
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    Quote Originally Posted by Dmarzke View Post
    After about 2 years I started having this issue.

    Marked the position of the grub screw, clamped the shaft with some vice grips, and used a dremel cut off wheel to make a series of grooves in that area.

    Hasn’t budged since.


    Sent from my iPhone using Tapatalk
    Appreicated if you can provide some pics for sharing sir.

  10. #10
    RC Enthusiast
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    Quote Originally Posted by ThatTraxxas View Post
    I would get the arrma pinion from an outcast 8s.
    I don't think the Armma pinion can fit into the stock motor shaft all the way in without any modification to the stock motor shaft.

  11. #11
    RC Qualifier
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    Quote Originally Posted by evo165 View Post
    Appreicated if you can provide some pics for sharing sir.
    Actually I got the idea on here some place.

    I will see if you can see it in the car tomorrow.


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  12. #12
    RC Turnbuckle Jr. ReglarGuy's Avatar
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    If your truck's motor is running hot enough to loosen Red Loctite you might need to change your gearing, or get a stronger motor. You can make a temporary band-aid by carving out a notch in your motor's shaft, but down the road (I suspect) your motor is going to poop out on you. It takes a lot of heat to loosen Red Loctite.
    Life's to short to be a sour puss.

  13. #13
    RC Champion
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    Quote Originally Posted by ReglarGuy View Post
    If your truck's motor is running hot enough to loosen Red Loctite you might need to change your gearing, or get a stronger motor. You can make a temporary band-aid by carving out a notch in your motor's shaft, but down the road (I suspect) your motor is going to poop out on you. It takes a lot of heat to loosen Red Loctite.
    Yes!

    Cleaned mine with isopropyl alcohol, blue loctite when I geared up a bit with the 50t spur and larger pinion gears on 8s, tighten it well with a real wrench, but not too tight.

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