"LT" tire pressures on Expedition
I moved up from "Heavy Load" tires on my Expedition to real "LT" tires. Max air pressure on the new tires is 80#, max pressure on the heavy load tires was 50#. I always ran my other tires at max press...
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You will have to test a few, trial and error. It will be a compromise of bounce/firmness, control, and tire wear. When I had LT tires on my half ton pickup, I ran 40 psi all around unloaded, and 50psi loaded/towing. My 3/4 ton Suburban with OEM LT-E tires recommends 50psi front and 60 psi rear. It weighs about 600 pounds more than your Expy empty, but had higher capacity. I would start 40psi empty and 50psi towing. I bet that is close for your situation.
