Rear mech shifting problem
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.