The 113 was good in Vietnam, once they got the diesel versions in-country, but it tended to be used more as an armored scout vehicle and fire support platform (ACAV configuration, anyone?) than it was as a transport. And they had the same reliability problems there that CavGuy mentions in his linked thread. Was it effective in its day? No question. Could we do better today? I'd say so.

And it was never officially tagged the Gavin.