Just wondering what kind of mileage you guys are getting with your 37's. I just recently upgraded to 37's but am still running stock 3.73 gears which will be upgraded very soon to 5.13. What kind of mileage are you getting with 5.13's?

Here's what I'm getting on 3.73's if you're curious. Actually not too bad. Today I drove up to New Hampshire from Southern CT with mixed highway and local roads, hills and flat. Filled up, drove 190.4 miles, reset the trip and refilled with 14.94 gallons. So I did the math and got 12.7 mpg. I averaged about 65 mph. On the return, I drove 218.6 miles, refilled 16.1 gallons, and got 13.6 mpg. I averaged about 70 mph. I only lost 1-2 mpg over the 315's I had on before. Not too bad. Curious how the 5.13's will do. I've heard some getting back stock numbers and others with no improvement mileage wise. Let me know what you all are getting.

 

i did not upgrade for the mileage...lol

we run 5:13s with 37s and I would estimate 14 - 16. We have an aftermarket power programmer package on it also. We did notice a slightly better result after the programming was done.

I will say the 5:13s improved the response a bit....but I drive it at 90 on the highway , one can almost watch the fuel gage drop and the wife runs it at 5 above the speed limits so she gets better MPG...

 

Hell yeah! If I was concerned about mileage, I would have kept it stock. Just curious now with gas prices going crazy. And running to the trail heads 300+miles away is starting to take a toll on the wallet.

 

im getting 14.5 mpg with mine.