Our car was also an ex-fleet car. At around 106k miles the pump shaft cracked where the two pieces were supposed to be welded together and boom no more forward motion. At first my father wasn't sure exactly what happened but I think that the transmission was going to need to be rebuilt. If we had immediately turned the car off the transmission might not have gotten any worse than the initial damage. Alas it was not to be since it had failed in February of 2003, about one year ago, and the motor had to be kept running because it was far too cold to just sit in the car without heat. There was apparently a lot of damage to it once it was torn down for the rebuild. It had cost us $1680 iirc to fix our car. Unfortunately my father only saved the pump shaft from the pile of replaced transmission parts, otherwise I would have had more information on what happened to our transmission. What I felt was strange was that the car had been recently paid off, and my dad had just received partial payment for a project that he was working on.