where do i get these 3.55 gears and what does that mean, please anyone let me know some more information about gears and what these will do for me, power? gas mileage? torque? or just a cooler number than what ever the other gears are, hah anyways let me know, thanks everyone,

 

How Stuff Works can show you all you need to know about gear ratios.

http://auto.howstuffworks.com/gear-ratio.htm

 

click here to find out what you currently have. Read the code on your door sticker.

 

so i have the 3.55's on my 2003 supercrew the code said h9 and someone showed me what was what, so now if i do 285's i should be ok, and it wont affect my gas mileage or slow me down all that much?