Gdads51: Oops, typo! Yes, I did mean 292!
It has the stock 4 speed; I will need to pressure wash it someday to look for numbers on it. Same with the rear. For now, it has a vacuum operated 2-speed differential with "GMC" on the cover. Pretty much the whole drivetrain after the engine is stock. Of course, I know the manufacture didn't always make their own drivetrains for bigger trucks, so I don't know if "stock" is of any help to you.
