Couple days ago I got out of the Jeep and I passed by the rear left tire and smelled a strong oily smell. Looked under the Jeep and see that the rear pinion seal is leaking. Great. Smell around the entire Jeep to make sure that's the smell and I couldn't find the smell except inbetween the fender flare and the left rear tire so I'm pretty sure it's not the rear pinion that I smell. Not totally sure though because I haven't had the time to get under the jeep yet. My friend says it smells like burning rubber but it definitely has an oily smell. Lastly I've checked a couple more times and the smell occurs after driving around even for just 5 min. Any ideas what this could be?