Rear mech shifting problem

Cornish Trekker

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

Chunkers1980

Bent hanger?

cooldad

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.

pesky_jones

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

Global warming.

cooldad

ps that's up. Bloody rain.

miceden

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.