why are they called 4by4

[1977f150]

how come 4 wheel drives are called 4 by 4s from the factory when you only have non posi units one wheel in back and one wheel in front that drive the truck i dont get it

 

[hillbilly]

how come 4 wheel drives are called 4 by 4s from the factory when you only have non posi units one wheel in back and one wheel in front that drive the truck i dont get it

To sell more trucks.I guess 2wd is better than 1wd.from the mountain.hillbilly