I went from 15 to 17mpg in the city highway dropped to about 18.

 

When i switched from 3.42 to 4.10 all I had was a CAI,Catack, and tune. I was .4 tenths quicker in the 1/4. Of course this was after the tune with adjustments. Also this was on a open diff. both times. The Eaton hadnt arrived and I was anxious so I just put the gears in to go to the track. The most noticable was away from the track though. They were fun on the street. Im actually debating on 4.56 for my current setup and probably need them but 4.10's will do for most. One of my favorite mods!

 

hahahha, i have a Eaton LSD and Motive 4.10s sittin on my back seat.... dont have the time to take it to get them put in.. Maybe one day..

Hopefully ill have my headers and stuff before November.......


Dockrocker went from 3.08 to 4.10... i bet that made a lil difference with his truck.

 

well my mileage isnt bad if i stay easy on city below or at 2000rpm wich is more than enough to get moving i get 14-15mpg and on the highway at 75 i get 18 mpg im sure i could do 19mpg at 65 but cars dont move very slow around here.

 

My 4.11's are going in tomorrow after reading this thread and running my truck at the track last night.

 

whatcha run last night? what were the stock gears?

 

It ran a 15.25@94mph with a 2900 DA and 98 degree's. I have 3.23's right now. Its getting 4.11's in tomorrow and im hitting the track again tomorrow night. I need to mess around with the tune alot more also.

 

very nice. 4.10's dropped me .5 in the 1/4 with my 4.8 RCSB. good luck!

 

Yea, im hoping for the same! Nice truck!

 

thanks, but your looks better. plus those 20's are gone, now i'm riding on the aluminum 17's