I have a number of these Sachs units in my fleet. Generally the G springs are the issue, the portion that rides on the gear index spool gets worn down and at some point won't engage the index spool's notches deeply enough to resist the rear der's return spring tension. However a less then ideal low gear limit adjustment on the rear der can also feel much the same. This is easy to spot without taking anything apart. The G spring carrier ring can also crack and have some of the same feel. But this problem is usually felt in all the gear positions. Lastly after many (and I mean many) miles the index gear spool can wear it's notches enough to have even new springs not hold. But in the, about, 60,000 miles of Ergo use I've had (and the 25+ shifter servicings I've preformed at home and at work) I've only had to replace one index gear spool, a few spring carrier rings and nearly all got G springs.


If you do a shifter overhaul take care to not load up too much grease on the G springs, only a thin skimming on the index spool and a dab on the springs are needed in this area of the shifter. Andy.