12-05-19, 06:11 PM
the selector drum has a spring loaded roller type locator to locate the gear drum in the right position my guess is the spring has snapped and alowing the drum to move out of line with the selector shaft https://www.fowlersparts.co.uk/parts/416...t-cam-fork
13 14 15 are the parts that hold the selector drum in place in each gear
13 14 15 are the parts that hold the selector drum in place in each gear