Was wondering because I was thinking, I got bigger tires, I tow quite a bit, and it seems like the truck isn't staying in its power band when I hit the hills. I was thinking it would pull better and maybe even save a little gas. Let me know what you think.

 

4.10s are only available in 2wd if I recall correctly. That's why alot of the lifted folks go with 4.56's. What are you running now, 3.73 or 3.55?

- NCSU

 

4.10's are available for the front 8.8, it's just that people usually just go straight for the 4.56 to really gain some of that power back.

 

I guess I was thInking of the 4.30's. Whoops!

- NCSU

 

what size tires did you go to?

general rule is 4.56 w/ 35's and 4.88's with 37"+

are you 2 or 4wd?

 

4x4, still got the 3.73 , and there 35s. So 4.56s would be the best bet.

 

Yes. Going from 3.73 to 4.10 would be a major waste.

 

So 4.56s are the best way to go huh? What are y'all taching say @ 65. I'm 1850 right now @ 65.oh and did your gas mileage change for the good or bad.

 

I've got factory 4.10s with 31"s right now, spin 2000rpm at 65mph and can get 18mpg hwy/13city.
If you tow at all I'd get the 4.56.

 

1,850 / 3.73 x 4.56 = 2,262 rpm

 

I've got 4.10s with 34" tires. Seems about right to me. A little more bottom end than the stock setup.