Rear mech shifting problem

Cornish Trekker
Cornish 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

Comments

  • Chunkers1980
    Chunkers1980 Posts: 8,035
    Bent hanger?
  • cooldad
    cooldad 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_jones
    pesky_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
  • cooldad
    cooldad Posts: 32,599
    Global warming.
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  • cooldad
    cooldad Posts: 32,599
    ps that's up. Bloody rain.
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  • miceden
    miceden 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.