Overdrive solenoid installation issues

1946 R9-B1 trans OD. I’m having a devil of a time trying to get the solenoid pawl installed in the slot. I’ve attempted inserting per the instructions (90 deg insertion and rotate) but it just won’t go into place. I have another R9 OD and it installs fine in that unit. Ive visually inspected both of my units and I can’t see any difference. Any words of wisdom from the Hudson hive?
thanks in advance
thanks in advance
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