You guys don't want 4.10's believe me, I tried them. I am running 4.56's and run 80mph @ 2000 rpm's with a 29.7" tire. Learn from my mistake you won't regret it. If I was going to be pulling a heavy trailer much then you would want 4.88's. I drove my truck on a 700 mile trip and ran between 80-90 and got 19.888 mpg with the 4.56's.