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  1. #1
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    Deore M591 Shifter thumb throw changes length

    Sounds weird, but it's hard to explain. When I try shifting into a lower gear by pushing the thumb lever, the throw is wayyyyy too long. It's uncomfortable how long I have to push it. But then it will be easy, normal and short the next time, which allows me to change multiple gears in one throw if needed. Then it will change. Sometimes if I play with it the lever will "set" allowing me to shift normal. Is the shifter just broken? Any advice? I have brand new cables and cable housing.

  2. #2
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    Hah you are probably touching the release lever at the same time as you are pushing the thumb lever...

    Happens to me in winter gloves.

    Alternatively pull the plug where you put in a new shifter cable...squirt in a little WD-40...then blow out with compressed air...sometimes the dirt and grease can get into the mechanism...this kinda redistrubutes everything.

  3. #3
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    Quote Originally Posted by jeffscott
    Hah you are probably touching the release lever at the same time as you are pushing the thumb lever...
    Not this.

    I'll try some WD-40.

  4. #4
    Rub it............
    Reputation: frdfandc's Avatar
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    Flush the internals with WD-40 through the cable replacement port while working the shifter up and down. Use compressed air (one of those little cans for computers work well) to clear out the WD-40. Then use a nice lube like Tri-Flow.

  5. #5
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    Quote Originally Posted by frdfandc
    Flush the internals with WD-40 through the cable replacement port while working the shifter up and down. Use compressed air (one of those little cans for computers work well) to clear out the WD-40. Then use a nice lube like Tri-Flow.
    Quote Originally Posted by jeffscott
    Alternatively pull the plug where you put in a new shifter cable...squirt in a little WD-40...then blow out with compressed air...
    This worked, thanks guys!

  6. #6
    Rub it............
    Reputation: frdfandc's Avatar
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    I like how jeffscott added the WD40 suggestion to his original post after 2 people said to use WD40.

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