[Ramming Don]

I am in Texas and well the temperatures are no where near "cold" but the fuel could be different. As a matter of fact fuel mileage did start to decline when the colder temps came in. It is the original tranny, minus the shift kit and sensors, truck has less than 70K on it and there is no slippage had that checked the other day. I am going to chaulk it up to different fuel. Also, can I change those gears? Recommendations/thoughts?

You could change gears but I would change tire size personally. I would love to have 4.10's I would run 37's but since I have 3.73's I am only running 35's. Gears can be changed but it is better to pay a professional mechanic to do it and that runs around $250+ for the labor.

 

[Ramming Don]

What size tires do you have now???

 

[Ramming Don]

3.73's are a great all around gear, actually one of my favorites. But remember the money you spend for gears, lube and labor, vs. the amount of fuel you will actually save takes along time just to recoup your investment. There isn't really that much difference for me to justify a 3.73 to 4.10 swap. Back to the tires again, you would only have to go up like one inch or so to get the same gearing as the 3.73's. This is just my opinion from building several 4x4's and race cars/motorcycles. Money could be better spent on other mods to increase MPG.:beer