If it's that little plastic thing, you can try what I did: drill a 5/64" crosshole in the end of the "pin" and insert a cotter. Saves taking the thing out to hit it with a hammer to peen it in place.

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'82 300SD - 361K mi - "Blue"

"Good judgement comes from experience. Experience comes from bad judgement."

listen, look, .........and duck.