On my truck, I really didn't notice a change in MPG at all.
But the performance improvement was definitely noticeable.

More perfomrance at the same MPG is a winner in my book.

Depending on your tire size (I was close to stock), you should get better city MPG if you have big tires.

 

Iam looking at some toyo open country m/t 35x12.5x18 ( to put on stock wheels). I have 3.75 gears on my 2006 fx4 reg.cab.Do i need to regear to 4.10 or would 4.56 be better? thanks

 

Don't waste your time running 35's on 4.10s.
Especially if you are have 3.73 now.

You should get 4.56 for sure.

 

thanks. The best price i have found is around $1500. Is that about right?

 

Thats about right.

We do the front and rear for $1450 plus tax if you have the 5.4 which has the 9.75 rear axle.

$1350 for 8.8 rear axle.

 

You charge $1350 for just a rear 8.8!?!

 

Dude, if you are charging $1350 to replace a ring and pinion set in a rear end I am afraid your business will suffer. Any reputable mechaninc will do it parts and labor for $550 to $650 on the books, may $450 cash.
Hmm....................... Whats the name of your shop?

 

I think you guys are mis-reading his entire statement:

I think he's saying that it's $1,450 front and rear with the 9.75 rear axle.
And $1,350 front and rear with the 8.8 rear axle.