While driving our 1990 toyota corolla (3-speed automatic transmission) on the freeway recently, the car gave a slight jerk, at which point my husband looked at the gas gauge and noticed it was well below "E".. Oops. fortunately, there was an exit right there with a gas station. Filled up and we were off toward the next on-ramp. Got to about 35-40 mph, and all of a sudden the car literally just stopped moving forward after violently jerking back and forth several times. We then tried to put in neutral and push it to the side, but it wouldn't even do that. Everything was locked up, seized solid. Somehow we managed to get it to the side. The flatbed tow truck took us home, and all we could do by that point was move a foot or two in reverse after it dropped us off... fast forward... After several days/weeks of it sitting around we can now actually drive it forward! reverse! but we haven't taken it out of the driveway to go more than 5 mph.. We had seen some fluid leaking prior to this incident, but could NOT figure out where it was coming from despite checking obvious fluids meticulously every couple of days. A friend said it might have been the diff fluid?? Any ideas out there what this is? We'd like to fix the car, but to repair a tranny on this old car (although it only has 67K miles!!!) is too expensive. My husband wants to make it a weekend project. Uh Oh..