my 7.5 3.73 open is leaking out the diff cover so im proabaly just going to swap over to the 4.10 posi 8.8... i was planning to anyway so i dotn want to spend a dime on this POS 7.5 thats in it now. Im running 31's ona 2wd with a 5 speed and im putting on 32s when i do the axle... just curious what you guys think the mileage would be? the engine speed at 65? ive got flowmaster 40 series duals and a K&N CAI too

 

well my 4.0 avgs between 13-15 city and 18-21 highway

 

hmm. i get 20-21 combined wit 3.73 open... ive just been driving around on stock tires for a couple days and realized how much easier it drove and how much the 31's slowed me down. i think the 4.10 and 32's would be pretty close to the same ratio