I started driving a 4 and 2 before I had a drivers license. And I drove a 5 and 2 in a semi for 400,000 miles. The vacuum shifts are nothing but trouble and they are not needed if you are not hauling a load. I just lock them in high range, which is really pretty low, and just shift the transmission. I figure I don't need any practice playing with a 2 speed. Eaton electric and air 2 speeds are easy to keep operational.
