It is not the rear seal, as I thought. I got under the car today to inspect the drive shaft and flex joints and they both are tight and look fine. There appears to be a 3-4" long connector that has a piece of rubber surrounding it that is the cause of leak. It plugs into the transmission on the driver side. Can anyone tell me if this component just needs to be adjusted or replaced? If so, how much would it cost? I'm guessing that the whole line won't need to be replaced... it looks like it could just be unplugged and fixed accordingly.