Coupler change did not fix the noise
I just chnaged out my coupler because there was a noise that sounded like the coupler was bad. The noise was a rattling / growling noise, that went away when I took of the SC belt.
After the coupler change, the noise got much better, but it did not go away. I just drove a 250 mile trip and the noise is loud again. One confusing thing is that it gets worse when i'm in neutral and almost goes away when I shift into gear.
Could this be a bearing?