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Rear mech shifting problem

Cornish TrekkerCornish Trekker Posts: 79
edited January 2014 in MTB workshop & tech
I'm having an issue with a rear mech (XT). On tour recently the shifting got erratic on the rear. Came home stripped and cleaned the rear mech, replaced gear cable with jag wire, checked housings, all good. Reassembled, same problem. I initially thought it was the build up of crud on the mech but when spotlessly cleaned up it's the same. Alignment is spot on so it can only be the mech or the shifter, right? the shifters are XTR and seem to be operating fine. Could the rear mech be screwed? it is a good 5 years old at least.

thanks guys

Posts

  • Chunkers1980Chunkers1980 Posts: 8,035
    Bent hanger?
  • cooldadcooldad Posts: 32,599
    Replaced inner and outer or just the inner? If just the inner, replace the outer as well.

    I may have mentioned this before but *99.98975475623% of shifting problems are due to cables.
    *true proven fact.
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  • pesky_jonespesky_jones Posts: 2,890
    cooldad wrote:
    I would change cable - inner and outer first.
    As I have said before 99.9875462145897897% of shifting problems are due to cables, assuming the mech is indexed correctly.


    Oh, so it's gone down by 0.00220854164% since Jan?

    2014 cables must be better
  • cooldadcooldad Posts: 32,599
    Global warming.
    I don't do smileys.

    There is no secret ingredient - Kung Fu Panda

    London Calling on Facebook

    Parktools
  • cooldadcooldad Posts: 32,599
    ps that's up. Bloody rain.
    I don't do smileys.

    There is no secret ingredient - Kung Fu Panda

    London Calling on Facebook

    Parktools
  • micedenmiceden Posts: 225
    Does it happen under power or even when the bikes on the stand and you're turning the cranks by hand? Check the hanger & the cassette.
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