Thanks for the info. Do you know the mopar # of that seal? I had several NOS parts come with the car, so I may already have the seal. I probably wouldn't attempt to replace it even though I'm sure it's not that hard to do if you know what your doing. I've never even had a rear diff cover off on a car I've owned, let alone worked inside it. I leave that stuff to my mechanic. I will grab that $10 seal though. Will keep it around for a rainy day.