1976 Dodge Mobile Traveler transmission - how many gears?

The 318 was a good engine in its time although a little small in displacement and IMO, very under powered for your application. As previously mentioned, 3 on the tree is all you get. You could change the differential ratio to lower the revs per mile and save a little fuel under some conditions but, that would make it even slower out of the hole. It needs the revs to make sufficient power for highway cruising.

Chum lee