i have a 2002 f250 7.3 with a aem brute force intake,magnaflow 4inch, edge juice with attitude monitor, and a 3inch leveling kit with 33 12.50 17
my truck has the 4r100 trans with 3.73c rear end gearing, if i wanted more go and more top end what do i need to change with my rear gearing.
thanks for any help

 

More go...taller gears (higher number)

More top end (speed)...lower gears (lower number)

 

if i go for faster high end how much low end will i loose, or will i still be able to smoke off the line

 

You'll get more go if you get a DP Tuner or a Tony Wildman chip.
Your gearing is pretty good as it is for Wyoming and the LOOOONNNNG stretches between towns.
If you gear it down with, say, 4.10s you'll have a ton of stump pulling power and accelloration, but get out between towns and the engine will be roaring.

 

thanks for the help ill try adding a chip