You're right, except for the fact GM's brand was rebranded back to AC Delco.

Perks of working at dealerships.

So that means ANY AC Delco Synchromesh will be the same, Dealerships just rebrand main fluids as theirs, and tweak it a little bit. Do you really believe Ford/GM/Nissan/Mazda/Toyota/etc all have their OWN lines to produce Oil, MTF,ATF, Brake fluid, Gear oil, Power Steering fluid, etc?

But anyway glad you sold them.