i have an old diamond back topanga (1995) I'm fixing to get back on the road. the problem is the rear derailer shifter does not work. i think the ratchet in it is broken, the levers move with no resistance. when i shift up or down the cable does not move but it is atached. it feels like its broken internally so i probably need to replace it?
well after looking for one online, the only ones i found are shifters that mount on the bar. the one i have is mounted to the brake lever.
this is what I'm trying to describe.