Rookie post even though we've own this thing since 2005.  Often herd there are no dumb questions, well here is one    Our Trailer and stuff in bed of pick up is about 12,000 pds loaded.  2001 truck is stock with 47re with a 4:10 rear end.  When going up long mountain grades, I make it point to not go over 1150-1200 on my pyro.  On long upgrades I usually end up falling in line with the big trucks and just chug up to the top about the same speed.  But not unusual to be passed by other people pull