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Automobile Enthusiasts
In reply to the discussion: Haven't posted in here before, but I'm picking this up tomorrow and I am about to BUST! [View all]A HERETIC I AM
(24,829 posts)44. Torque
        why on god's green earth does any truck maker think there's a need for 20 gear shifts?
To get the heavy load moving, you need torque, and a transmission basically multiplies torque. As a general rule, you need multiple, closely stepped gears in order to get the weight moving from a standstill up to speed.
That transmission was built before the days of air operated shifting. The silver truck I showed above would have had 2 sticks if it werent for the fact that it had the ability to move gears inside the tranny using air pressure
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                        Haven't posted in here before, but I'm picking this up tomorrow and I am about to BUST! [View all]
							A HERETIC I AM
							Feb 2018
							OP
                        
        
        They vary, but a "5 over 4" is basically a 20 speed transmission.  Watch this vid;
        A HERETIC I AM
        Feb 2018
        #35
      
        
        On my way now, but I wanted to give you an idea of this 6 speed final drive
        A HERETIC I AM
        Feb 2018
        #57
      
        
        Had a '69 big block convertible, a '76 bought new. And a '86. Belonged to
        sinkingfeeling
        Feb 2018
        #48