There are heaps of new gearboxes for auto engines every year.
Just go to Oshkosh each year and you will find a couple of new versions that are claimed can take you to the moon and back.
They are their the first year to try and sell their product, most don't come back a second year but if they do they don't make a third year.
A year after that we all talk about....
"do you all remember that Gearbox that used to be made for the car engine....., I wonder whatever happened to that......"
and, the cycle repeats itself.