If you really have 5.38s, which I am skeptical of, then you should have no problem pulling any hills. Your max speed will be 60-65 due to high rpms, but you should lose no speed going up hills. I have 35s and 5.38s (and a couple less hp than you) and have towed 4000 lbs uphill at 60 mph.

I suspect there is something wrong with your engine.

Mike

"Damn the carnage! Full throttle ahead!"

95.5 rodeo, 37" Trxus MT, dana 44/9", coil-overs, lockers..... http://www.cardomain.com/memberpage/550454