shift rod retaining clip

backing out of garage found reverse was locked and heard reverse rod dragging - anyway, was lucky and able to pull rod at tranny end and get out of reverse and temp fix with a cotter pin - when I get correct clip, does a washer go on behind these? thnx
maybe keep a couple in glove box

I try to put a washer (even just a really thin one) behind any clip that the linkage moves against so the linkage doesn't drag against clip possibly working it off.