Things to try
Is this one of those situations where you can shift back in the other direction and then get it to work? This is an occasional problem with Campy front shifters, but it is quickly fixed by shifting back and forth. Assuming the cables were properly done by your shop, the only standard fix for Shimano shifters is to flush them out with solvent or aerosol lube (like TriFlow) while working them through the gears. If that doesn't work, and the cables are done right, then it might be time to submit a warranty claim.thedips said:sometimes my left shifter freezes up and i cant shift from my big to small chain ring.. when i press the lever in... it wont click feels... like its stuck... when i apply firm pressure it feels like ill break it... then i dont know how.. but later on i get it un-stuck and it will shift up and down fine... seems hard to replicate... as it is right now its stuck again.