Thank you for that feedback. Chris the manager there sounded like he knew what he was talking about.
On a related topic, transmission fluid. Manual transmissions have steel gears and a soft metal, like brass, for the synchros.
So why do some manual transmissions use ATF, some use Motor Oi, some use Syncrhomesh oil, some use gear oil?
What are the design differences, in transmissions, that require these different lubricants?