Truck Shop
Senior Member
You mean Main & Auxiliary. Those can still be bought/ordered, but no one does becauseSo what about sub-transmissions?
those require some memory people don't want to use anymore, plus the design of those
was because 220 HP was about all that was available in big power in the 30's,40's 50's &
early 60's. With the power of todays engines there just is no reason. 4x3, 4x4, 5x3, 5x4 &
6X4 were the common. Like I said before a 9 spd & 4 spd 2141 auxiliary makes a great
combo. With any set-ups like that the aux is left in direct in many cases just using the 9.
But it gives a bunch of low gears when needed using deep under/under, the in high range
on the 9 you can split the top four between direct and over. All of this provided its a
progressive ratioed auxiliary.