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  1. #1
    BJF
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    XTR 9000 possible cassette issues

    I'm running a 11 speed XTR drivetrain on my bike and I seem to be running into an issue. When I'm in the third or fourth largest cog in the back and I come to a quick fast uphill the drivetrain sounds like it is going to explode. I can't even accurately describe the noise. The bike shifts flawlessly and there is no noise in the biggest cog or any other really. I was told to take apart the cassette and look for cracks in the carbon. No issue. I have taken it off twice and regreased everything and it seems to come back.

    Does anyone have any ideas?

  2. #2
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    load it up with grease? Seems to help on mine.

  3. #3
    BJF
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    Quote Originally Posted by epic View Post
    load it up with grease? Seems to help on mine.
    Are you having the same issue? Same cogs? Same drivetrain?

  4. #4
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    Sometimes. Yesterday I was. I'm gonna just take it off grease the crud out of it and see if it goes away. I expect that it will. If not, I'll check the freehub. I was waiting for my bike to turn into a zero-speed at any minute yesterday, but it was quiet as a a mouse in the smaller cogs so I think I probably just need to grease the cassette. Did Shimano tell you to look for cracks?

  5. #5
    BJF
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    Mine is very isolated to a couple cogs. I'm running a dt hub so I checked the engagement paws and they were fine. Shimano did say to grease it but it came back so it can't just be that.

    Other people told me the carbon or rivets could be suspect but I found no issue upon inspection.

  6. #6
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    How do you inspect a rivet? The problem areas are confined in the assembly, you would never know if it was failing unless you did some kind of X-ray...
    Todd

  7. #7
    BJF
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    Check to see if they are loose? Flex the thing back and forth to see if I can replicate the noise or if there is a hairline crack.

  8. #8
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    Flexing? That seems like a path to failure on its own. Those parts aren't designed to move that way.

    Soak the rivets with some Loctite 290 when new. It will wick into the joint and fill the clearance gaps and make the pins stronger.

    I would clean it all and start fresh with a dry lube on the freehub body. Grease collects dirt and this is where creaks and sound come from.
    Todd

  9. #9
    BJF
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    Well if it can't handle my hands it probably isn't strong enough to ride on.

    Any recommendation for a type of dry lube?

  10. #10
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    Anything that doesn't stay greasy...
    Todd

  11. #11
    BJF
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    I did a Google search on these new cassettes. Seems im not alone with issues

  12. #12
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    Check your chain. I just greased my cassette and it did not help. For full disclosure, I installed full M9000 drivetrain in May. I bought two cassettes and am running them on two different wheelsets. I greased the "creaky" one and then tried it. No dice. So I switched wheels and tried the other cassette. It was also creaky even though it was quiet last time I rode it. So I know it is not the one cassette, and I know it's not a broken axle or freehub body. So before getting crazy I pulled out the trusty TL CN-41. It showed just a little bit of wear on the chain. I had to kind of force it in, but compared to a couple other chains it was definitely showing wear. So I popped a new HG900 chain on it and it's dead quiet now. Problem solved.

  13. #13
    BJF
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    Would a chain only make noise Ina couple of cogs? I really only have a few hundred miles on the set up.

  14. #14
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    Quote Originally Posted by BJF View Post
    Would a chain only make noise Ina couple of cogs? I really only have a few hundred miles on the set up.
    Mine did. The bigger the cog, the more noise. I think probably because you make more torque in the bigger cogs.

  15. #15
    BJF
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    Makes sense but wouldnt explain why mine is silent in the biggest cogs

  16. #16
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    Grease on a cassette?
    I've never put any grease on any part of a cassette to make it quiet.

    Where are you slathering the grease?

  17. #17
    BJF
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    Lightly on drive shell and carbon to carbon contact. A shimano rep said to do it as well. Who knows. Lately can't recreate the noise.

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