I did some more research and had another look at it. You might be right, considering 1st is marked as Low.
Really hoped to get a higher 5th gear, since it is revving high at just 80km/50mph. Plus, the trans is leaky and pops out of 2nd. While my rear axle is good, including the brakes and tires on it. But it sounds like an axle swap for one with taller gears in the diff would be a more likely find. Too bad I couldn't just change the gears in my 2-speed diff that I have, but doubt there is enough room for a larger gear.
(Attached two photos of the 5-speed and one of my 4-speed.)
