I can take off in 4rth and bypass 1-3 at a stop light! Realistically the NV4500 is driven as a 4 speed. All NV4500 transmission except the early chevy transmissions have syncroes between every gear. You can shift from 2 to 1 while it is moving.
I don't want to hijack this post on 4 speeds, so if you want more specifics on NV4500 swaps, do a search, start a new thread or PM me.