Hey guy's got a few questions about differential gearing. I have a 4.6 3v with 3.31's. I recently went up slightly in tire size. I have noticed that my truck is downshifting a lot more often. I tossed the idea around of getting a programmer (cheaper option) but after reading up on them and talking to a few peeps i'm leaning toward gearing it. Down the road i'm looking at upgrading to factory 20's. I've been looking at 3.73's but the more I read the more i'm leaning to 4.11's. Anyone want to chime in on this. If you have 3.73's or 4.11's what tire size are you running, what rpm are you at at 70-75mph? Did you take a large hit on fuel mileage, or maybe even a slight increase. Thanks

Also if you've re geared what brand did you go with? I'm looking at yukon and OEM. Yukons are half the price. I've heard good things about them

 

Kinda disapointed that no one had any info. Either way I went ahead and had the 4x4 shop that's doing the install order me the yukon 3.73 ring and pinion set and the master install set. I'm really glad I went by the shop to talk to him first. This whole time I assumed that I had a 9.75in. rear end. He took one look and said "just to let you know thats an 8.8in rear end. Worked out for me being as the master install kit was @ $100 cheaper. Supposed be getting them installed monday or tuesday. I'll make sure to update this then. My local ford dealer is going to charge me $115 to recalibrate for the tires and gears. That sound good? Thanks