Most of them that I've seen so far have 3.73s, but honestly, our trailer only weighs 5000lbs. If a 5.3L with 3.42s can pull it up a 6% grade at 55-60mph(which it can because I've done it), I'm sure a 6.0L with 3.73s will do us just fine
It really isn't a power thing for us, I just don't like being over our GVWR all the time. We also had a couple trips with really strong crosswinds, it wasn't complete white knuckle, but I was very glad when we stopped.
2013 Starcraft Travel Star 229TB
2011 Jayco X17Z(traded in)
2010 Jayco Jay Series 1207(traded for the 17Z)
2011 Chevrolet Silverado 2500HD Z71 CC 6.0L/3.73
Reese "Pro Series" 800lb Trunnion WDH w/sway control