well
a class is a tractor- trailer combinations, b is just a tractor.
if you have a you can drive a class b truck. air brakes are an endorsment that you have to get if you drive a truck with air brakes. it doesnt come with your class A automatically. you have to take a test for air brakes
haz mat, triples and doubles, what not
i have never seen a restriction on the tranny. i drive a 13 speed now wish it was an 18 speed.
autos are nice, less wear on the driver,
if you are gettign a cdl, my suggestion
get a class A, air brakes, hazmat, doubles, passenger, it will cost you more but you will be able to drive anything
trucker clock who wants it