Has anyone else had an issue develop on their XT drivetrain where it can be indexed perfectly, until you ride it? So indexing in the work stand is spot on then indexing under load is way off and no amount of barrel adjustment will allow smooth shifting through the full cassette. The bike has become unrideable as I can't hold a gear and I don't want to damage the cassette by pressing on.
I'm on an SB130LR, riding this drivetrain for 550km and not really had any issues, cassette looks great, teeth not showing much sign of wear. The only work I've done on the bike recently was a bearing replacement and SI service. The indexing has just started to creep a few rides after that. For reference the chain is pretty new and I've double checked the length is correct, the clutch is working perfectly, sag is set correctly (accounting for the holiday weight), B screw and limit screws are spot on, and the cable moves freely within the housing. I don't have a tool for checking hanger alignment but it was fine before and the bike hasn't taken any knocks so I'm doubtful that is the cause. I'm running the 8100, 30t crankset with 52mm chainline, as I thought others were on here so please correct me if that could be an issue.
I'm wondering if the cable outer could be pinching as the front and rear triangles move? Thinking something could have changed when I was accessing the SI unit for service. Planning to pull the cable out and check that next but it looks and moves fine in the stand.
Does anybody have any ideas for me before I go crying to my LBS? I hate not being able to figure stuff out.
Also, we don't seem to be able to search within the thread anymore. That was a really useful feature for this monster thread.