I think it depends all upon what kind of driving you do mostly with the truck. From an economic standpoint, 4.10s would make the most sense. When I was running 35" tires, I had 4.10 gearing. The truck easily could spin the tires, had tons of power, and ran at about 2100 rpms going 70mph on the highway. To me, if this truck is primarily a daily driver, I think 4.56 could possibly be too much as well. It's going to be louder going down the highway with those higher rpms, and the fuel mileage will suck. But, if you don't really highway drive and it's more of a toy for you, then sure, go with the 4.56s. All I can say is that even when I downgraded from 35" tires to 285/70/17 tires, I felt very little differance in power gains, almost discouraging how similar it feels to when I had 35" tires. That's my two cents.

 

how long did it take all of you to put them? and for 360 how much did it cost you?

 

I'm gonna run 4.56s with my 35s....a guy told me he put 4.56s in his truck with 3" lift and gained 4 MPG

 

well i have a car for mileage my truck is for truck duties aka towing trailers mudding working, i was thinkin the 4.56s with 35s with a four inch lift, and a 410 stroker haha yea thats right, its for play and work it aint being drivin for mileage in the first place