My 87 Gn only has 35,000 miles on it and my transmission is leaking fluid from the pan, probably bad gasket. but also there is this rattling noise coming from the trans. sounds like something is loose. It happens in park or while driving. One more thing, when i was boosting up a hill the back wheels started shaking, making the whole car shake. I had to slow down to stop the vibration. Any ideas on these problems.