I seem to be having issues with the path 8 gears as well. I see one problem similar to another poster where going up a hill (not even that steep of a hill) causing something to jump, like the chain falling off track. Another issue I'm having is the gears seem REALLY loud, not just a gentle hum but a constant rattling, it seems to be worse at the lower gears. Any suggestions?
Also, when I got it from the dealer the yellow indicator was not only not int he middle of the window, it was about 1/8" away from the window entirely, so I don't have much faith in how the dealer assembled it.