Originally Posted by
ShannonM
That's the post I followed, and it's good dope. The front trimming works great. The front shifting on the other hand, (or same hand...) only works until you let go of the lever. Granted, it works great until then... and even better on the immediate downshift that follows.
To be clear: Everything works except that the front shifter has no friction. None. When I shift up to the big ring, it shifts fine, grabs the ring, no worries. Then, as soon as I let go of the lever, the front derailleur snaps back down, the lever goes fully forward, and I'm back on the small ring again.
For a normal shift lever, the obvious cause would be the d-ring mounting screw being loose. But the mounting bolt is tight against the central body, and there's no resistance at the lever. Which is why I think I screwed something up when I reversed the cam so that the trimming would work with my normal front derailleur. (It came to me set up for a high-normal.)
I hope that makes more sense.
--Shannon
Ah! I see now. I think the simplest answer is unforunately to just get a new one from everything I've read about overhauling these shifters

Luckily there are still NOS examples being unearthed from hoardes and old warehouses, as well as ones hardly used.