[quote=MACS]Thanks for the lesson. I usually keep my truck tires at 35 psi. Can you post a link to the tire pressure tow formula? I'm interested to know if I should be bumping it up. My trailer weighs about 3600. I have no idea what the tongue weight is, TBH, and I am just guess-timating at the total trailer weight based on what I was told... never weighed it.
I know my truck doesn't like steep hills, but that's likely because it's a 4.0L V6.[/quote]
You can find various formulas on the web, and people argue about this stuff all the time.
This page has a few of the more popular ones.
I use the first one, and add 10% or so, depending on how far away I am from my max pressure.
http://www.rvforum.net/SMF_forum/index.php?topic=82286.0