On my 02 Focus SVT, I made a discovery this morning that made my stomach churn. I was driving to work down a main highway. 60 mph in sixth gear, light throttle, when suddenly, the engine began to spin freely. The shift lever wasn't pushed out of place, and the clutch was still engaged, but I began to lose speed. Interestingly, though, the speedometer began to climb with engine RPM's, so the speed sensor is still reading activity. I downshifted to fifth gear, and didn't notice anything different, so I went back to sixth. Later on down the road, after driving several miles at speeds not topping 50mph and having no issue, I reached another 60 mph speed zone. Cruising along at 60, it did it again, in exactly the same way. I'm no transmission expert, and I'm not exactly sure what to make of it, aside from the fact that its probably not safe. Any advice? Or similar experiences?