Originally Posted by
Vortac180
The front shifting is fine. The rear shifting is working OK, but gets out of adjustment frequently. It's a PITA, as I have to give it that half turn adjustment nearly every ride, every day. It seems this started when the front derailleur was replaced. I don't know why. Doesn't seem to make sense to me.
Sounds like a fraying cable, probably in the shifter. Replace it now -- and the housing, too, while you're at it -- or wait until it breaks and leaves you in high gear. At the bottom of a big hill. Far from home or your car.