[ErnessW]

I want to finish this thread with what happened to my car so it will be completed. The transmission shop which has the 2002 Focus wagon, informed me that when I put the replacement engine in, I should have also replaced the axle bracket which bolts on the back of the engine. Apparently the replacement engine, which had a manual transmission, has an axle bracket which is slightly different than a bracket for an automatic transmission. The result was the shaft was not going all the way into the transmission and could easily slip back, the result being lost of power to the wheels and loss of transmission fluid. So I sent the garage the bracket from the damaged engine and they said they are pretty sure that will correct the problem.
Now I'm waiting to see if there was any other problems with the transmission when they go on a test drive. (I hope this thread may offer someone else good insight if they attempt a similar fix for the dropping of a valve seat)
Of course, the car is over ten years old, so who else would try what I did when they can pick up a good used one for less trouble. Right?