Hi there good folks. I've made a thread (Chain too long?
where I mentioned this noise before, but this thread will specifically ask about this "problem".
I'm running an 1x11 setup with XTR M9000 derailleur and shifter, SRAM XG1195 cassette (X01) and KMC X11SL chain. The problem is that when I'm shifting to a lighter gear (larger cog) the chain makes a noise like it wants to shift back to the smaller cog. It works perfectly fine though (it doesn't jump down), and shifting is quick both up and down, but the nise remains. If I change to a smaller cog, the noise never shows up. And just recently I've noticed that if I'm switching to a larger cog, the noise disappears if i push the lever a little bit longer than I need to. This also changes the "resting position" of the derailleur (if you understand what I mean), so that the noise disappears without me having to hold the lever in this position. Hard to explain, but it's like I can change a gear an a half, without the derailleur moving back to the position it would have if I'd only change one gear.
Anyone experiencing the same problem? Is it just the way it's made? Or might I have a defective gear shifter or derailleur (probably less likely)? Hope anyone might be able to give me some info/tips.
I have the exact same drivetrain with the exact same problem (although I’ve just changed the cassette to XG1199 as everywhere seemed to be out of stock of the XG1195). Having suffered the problem for quite some time, I’m beginning to think that the problem is with the indexing of the shifter (changing up vs changing down) as I’ve noticed that pushing slightly in the trigger lever (without actually initiating a gear change, so only slight) will get rid of the noise. Barrel adjustment, and adjusting the indexing screws no the derailleur don’t make any difference.
I’m not sure if this is exactly the same for you, but it might help (I’m going to try another/new shifter)