Need some input on new gears, I'm currently running the stock 3.73's in my 08 fx4 screw with a 6" pro comp & 35-12.50.20 trail grapplers but would like a little more bottom end power,also may go up 2" more on my lift and run 37"s so I was thinking 4.56 or 4.88 gears but don't really know

 

Yep, do it

 

I would go with the 4.88s if you go with the 37s. 4.56 with the 35s

 

Make up your mind if you are going to lift it and go up in tire size. 4:56 should be fine with the 35", 4:88 with the 37". Also, what are you going to do with it?

 

It's a daily driver, off road a little, pull my boat. & bike sometimes, so I pretty much use it for everything