After being repaired, Orion Pax/Optimus Prime was well aware that Alpha Trion was the one who re-built him, and asked him to do the same to his girlfriend Ariel/Elita One. Yet in The Search for Alpha Trion (1985), Optimus Prime seems to have no idea of that. Though nine millions years passed since then, it is unlikely that Optimus Prime could have forgotten something like that.
When the Decepticons are talking about the Guardian Robots, Thundercracker says 'they really used to give us a pounding back in the days', his voice is not enhanced & sounds plain and not gravelly like his voice should be.