At 11200# combined and a speed of 62 mph we get 13 mpg with the dodge 4.8l
Never towed the TM with the Cherokee but towing a Coleman Mesa with it got about 15 mpg between Fl and NC. Again speed was 62 mph as that seems to be the sweet spot on the 4.8L with our driving habits.
As a little more comparison using the Dodge to tow a 28 ft Outback from MD to FL; I burned about 15 gals every 125 mile at 60 mph and O/D off. fwiw the 2008 Dodge has a tow/haul position which leaves some O/D. This is the way we tow the TM. There is about 600 rpm difference between tow/haul and O/D off when towing the TM. Fuel use is much higher in O/D off.
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Axis 24.1 E 450 chassis, 6 spd tranny. GVWR 14500# GVCWR 22000 # GW(scales) 12400 #
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mods: 2- 100 watt solar panels, on roof, 300 watts portable
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