My wife's bicycle has Shimano Revoshift shifters, and while the right (rear) one works fine, the left (front, Friction) has been problematic for a while. Originally, when we bought the bicycle, the left shifter made a clicking sound when it was turned. After a while, it stopped clicking, and since last summer, it has required tons of force to shift from the middle gear to the biggest gear.
I've tried to adjust the front derailleur (orientation, height) and the low and high limits, as well as the cable tightness, but nothing seems to remedy the force. This morning, I took the shifter apart, suspecting that something would be broken inside it, but everything seemed OK. I put it back together, but it still doesn't click and I have to use both hands to turn the lever to get it to the biggest gear.
I suspect that there's still something wrong going on in the shifter, though. If I gently pull the cable underneath the body, the shifter rotates. It shouldn't do that, should it?
The exact model is Shimano SL-RS35. Thanks for any help in advance!