manchu,
Another possibility is that TCMs PCMs etc may be 'provoked by the customer' (exact phrase from Ford
TSB document, although not relating to
TCM but
PCM). In other words, is it possible you were driving in a manner not completely followed by the
TCM, and it was confused? A glitch in other word? Just another possibilty. Speculation.
Powershift fluid changes are mandatory and critical at 60000km.
Powershift transmissions are not like the old 'slushboxes' (300000km + without a change).
Maybe you should point the above out to the dealer and suggest that there is no evidence it was done. Maybe Ford would give you some confirmation of the seriousness of missing Fluid change.
If there is still any doubt: Get a Fluid/filter change.