94 GA dies after being put into drive.....

Ok, so I finally got my car to stay running now and after warming up a bit it idles pretty good in park. However, as soon as I put it in drive it shakes and shimmers, the brakes become hard to press and finally it dies. The service light doesn't come on until I put it in drive and it starts these symptoms. My father in law says it could be the fuel pump, O2 sensor and the timing belt. If anyone here has some insight it would be great. Thanks.

TCC the plug on the front off tranny unplug it you will lose .5 miles per gallon no biggy let me know if it works