Yup, its the layshaft... have mine out right now (am replacing spur) mine clicks as it rotates, not a big deal at all...
The pins holding the two gears are slightly smaller than the holes in the shaft and shorter than the slots in the gears, so they shift as the shaft turns. Under load I doubt they move at all.
Last edited by MartynD; 06-02-2005 at 03:07 PM.