Mith,
Here's a quote from one of the more popular web-sites that cater to the N clan:
"Sherman transmissions were offered as a dealer installed option and were available
in overdrive (Step-up), underdrive (Step-down) and dual range over/underdrive models.
Most singles had a shifter lever on the left side of the transmission, but some were
offered with a cable shifter for a short time. Since the cables rusted and froze
up easily, they were soon dropped from the Sherman options."
And I attached their picture for a look-see