Springs extend the plungers or pivots the hooks on the later design.
7055 1952-1954
37080-41 1955-1970
34069-71 1971-1984
The Iron Sportster trap door assembly holds the mainshaft, countershaft, and shifter mechanism. The Iron Sportster shifter comes as the 34009-52 assembly.
7055
1952-1954
Just a lockwasher, just a plain-old lockwasher.
37080-41
1955-1970
34069-71
1971-1984 This bendable lock tab goes under the main bolt that holds the shifter mechanism in.