Springs extend the plungers or pivots the hooks on the later design.
34482-52(2) 1952-1971
37222-52
1972-1984
Two springs extend the plungers in the earlier carrier design. A single contraction spring pivots the hooks on the 1972 and later design.
The Iron Sportster trap door assembly holds the mainshaft, countershaft, and shifter mechanism. The Iron Sportster shifter comes as the 34009-52 assembly.
34482-52(2)
1952-1971
The early style carrier used plungers to ratchet the shifter plate.