I had someone say that to me last week when pulling into the gas station. This guy goes "hey man your CVs are goin bad". I was like "CVs? What? No man that's my front aussie locker, Wranglers dont have CVs". He had this baffled look on his face and went inside.
Yup before I put the wagoneer D44 in front I got that allot. Now with front locking hubs it is not so prominent and I don't get it nearly as often.
But yah when you tell them its your locker they just get this blank look! Or tell them the mechanic told you its your muffler belt!!