yes, I have driven two different Frontiers like mine with automatic. A friend had a Funfinder identical to mine. She pulled it all over the country and down to baja and back. She now has traded it for a Lance. This red truck is an automatic.
The overall gear ratio to the rear wheels in the automatic truck in third gear is nearly identical to overall in fourth in my manual.
EDIT: although to be honest, she tows in fourth ( of five in the AT ) because she runs faster than I do. She likes to run in the 65 to 70mph range. She thinks I drive like an old man at 60 ( she is right ).