I've had 32's with 3.55 for over a year now. And live in nor cal, and pull the grades. Mine will still pull overdrive up some lesser grades, but not on the steeper ones. 4 high works fine for me in the mud, But on the rocks, it reaches a point where it just wont pull up stuff. Low is fine, but not as much compression braking as i'd like. That said, i think its useable. But as soon as i can afford it, im going 4.56