The DynaTrac axles we have were specifically made for us for our application (including proprietary tone rings) and are not an off the shelf axle that has been modified. As for the mileage with fully loaded weight, Lance and I took the new EXP out for a trip a few weekends ago. In the snow, in 4wd we were still seeing ~10 mpg. Of course we will be happy to provide additional information when we have more in the field. These new V8 2020 EarthCruisers are by far and away the most capable and with our interior updates and features are real game changers. That said I am still a fan of the diesels as they have their place as well.Thanks, It will be great to see some updated MPG and max range data with this new engine. Also, do you know if the axles require an extension or spacers (as near as I can tell the Dynatrac 80’s are primarily used for jeeps/narrower vehicles than a Fuso)?