If the VMC manual is still in the MR, you can run data trap. This will show you states of inputs and outputs at the time of MLT. I would check PT relays, aux contacts on main contactor(s), encoder connections and brake switch (if you have one). I have seen MLT many times, haven't seen an actual stalled motor or locked up gear box yet (on this gear at least). I usually see MLT after the car fails to start a run.
