This exact thing happened to me. DO NOT put it off. one week after i noticed it, it started to make noise, soon after, there was a ton of vibration. I would definatly replace the entire axle. Especialy if its the original or close to it. I got my new one at pep-boys, they had a 50$ core trade in. It wasnt all that much, about 100$ in the end. Its good insurance. I wouldnt go refurb because its not all that much less and it is always nice to konw somethings brand new, expecially as important as an axle. thats my cent-and-a-half.