Hi. I'm new here and am hoping to narrow down my problem before the credit card comes out. I have a '88 5 speed wagon with 159k miles. While driving at 70 MPH I heard a loud rattle from some where in front of me that only lasted a few minutes. I stopped to look and could smell a burning smell under the hood. After that it started popping out of fourth gear. That was followed by increasing noise while shifting. I took it to a reliable shop who said I needed a new transmission, clutch, etc. The estimate was more than what I paid for the whole car. Later, I checked the fluid level and it was down. It appears to be leaking from the front of the transmission. I drained the rest of it and refilled it. All the noise went away and it was fine except for still popping out of fourth gear. The manuals all point to a worn shifter as the first suspect. However, the noise (which never reoccured) leads me to believe it could be suspect #2, the throw out bearing. What seems most likely? I plan on making the repairs myself. Any direction would be appreciated.