Will it give me better mileage? I know that is girly but I am looking to get my best mileage how can (I do that ?

 

Personally, probly not cause that front driveshaft doesent weagh that much.
What adds to our broncos not so good MPGs is the t-case and front axle.

 

It will not make any significant difference as long as your hubs are unlocked and your transfer case is in two wheel drive. You may want to verify that nothing is turning by placing shift lever in neutral and watch the axle shafts while someone rolls the vehicle. I would recommend using caution and a very trustworthy friend. I have never been rolled over by a 3 ton vehicle, but I am sure it would not be a good thing.

 

Well, too check if a hub is locked in or stuck, you can just jack one wheel up and spin it and watch the u-jount at the knuckle.