So I left school this morning in Georgia to bring my buddy home in Maryland, then head home tomorrow to NJ. I get about 200 miles or so, and after that time I noticed a slight whining coming from under the car on deceleration...not necessarily on the brakes, just coasting even. As I got farther it got worse, but the car was driving just fine. So I get to Virginia about 40 miles from my buddy's house, and I am coasting down a hill and not only is it whining, but theres a slight grinding/clanking sound coming from under the car...what I thought was the tranny...but wait it gets better. So I pull into a gas station, call AAA and have it towed the remaining 25 miles to my buddy's house. As we are taking it off the flatbed, there is a puddle of rear end fluid on the flatbed and it's clearly leaking from the differential. At this point I don't know what the problem is! I thought it was CLEARLY from the tranny cause I could feel it in the shifter, but I guess I was wrong. I stopped before it got too bad, and had it towed and my dad is coming down to Maryland with the trailer tomorrow. What could this be? At first I thought it would be either the clutch cable going, or the throwout bearing, but I replaced the throwout bearing, new clutch, and rebuilt transmission 2 years ago, and maybe only 8k miles it! Help me please!