I have a 1990 Jeep Cherokee with the 4 liter inline 6 engine. It's got 98,000 miles on it and I think the rear main seal is starting to leak. (it's dripping from somewhere in that area) It's not that bad of a leak, the only reason I even care is because it's making a mark on my driveway. Are there any products I can try that might actually stop this from leaking?