Originally Posted by jadmt
I can not see why it would matter front vs rear I know some manufacturers have a reputation for being noisey but as far as actual function there would be no issue as long as gear ration is the same. I am in the same boat I want 4.10's not 4.56 or 4.88. I have 33" tires which I like and spend a lot of time traveling 75-80mph so 4.10's are max I want to go.
2800 @ 75 Auto in Overdrive with stock Rubi 31s running 5.13 (shade under 3000 @80) ... not sure what the concern is... 75 is 3700 in 1:1 drive for passing. Very doable. From 4.10 to 4.56 is less than 500 RPM @70mph. Most people speed wander THAT much (if they're in front of me even more it seems) anyway.
I simply deplored the 31's with 4:10, my first impression was gutless under 2000 rpm... LOVE the zip of the 5.13s and 31s!!! I run 35s from late March to early november (trail ready) and 31's in winter (work vehicle). Negligible (<1) difference in hiway mpg... actually improves around town - less throttle to get moving.
Of course 90mph is a no go if downshift is needed to hold it... with either tire! (the 35 putbulls aren't happy over 70 anyway).