Gas mileage 4.7 automatic 4wd 77,000 miles 9 maybe 10 mpg . Any suggestions to improve the mileage.

 

Slow down. Remove lift kit. Smaller tires.

 

along with the above, reduce weight, properly inflate tires, tune up, drive like grandma.

 

No lift kit new smaller tires , I am grandpa

 

Then you are doing what you can.

 

Hard to say if the truck is generally stock. Maybe get maintenance current. Clean injectors and check O2 sensors.

I have 4.56 gears, a tune and 20" wheels and still average 16 mpg mixed. I won't dip below 10mpg unless towing while running E-85