How do you figure? You saying any transmission with a final ratio of 1 to 1 is useless? I will respectfully disagree.
The sm420 transmission is the stoutest truck transmission ever made, useless is a far cry away from the truth and as bold as you said it, I will say the complete opposite. See how long one of those saginaw 5 speeds will last in a 2 ton bigbolt.
Yes it’s a great transmission just:
Low first gear ( granny) is useless in normal driving other than parades. So it’s really a great three speed.
