Basic questions on 2000 F350, 7.3L

[sisiryder]

I just traded my 1996 F250 in on a 2000 F350 Lariat LE. I had a Bullydog chip in the '96. Where do I look to see if a performance chip is installed in the 2000? Also where can I find out what gear ratio I have (its a 4 wheel drive dually? If no chip has been installed, what is the best one to buy? I am concerned with the MPG, so I would consider some increase in power plus improved MPG? @#$%@#high priced fuel! Thanks, Sisiryder:

[todd]

chip will be in pcm behind emergency brake pedal dp-tuner is the best chip for 7.3s imo and ratio will be on a tag on your axle or under 1900 rpm on freeway probally 373 over 2000rpm probally 411

[schwarz_06]

my 2000 dually has 410 gears

[Hoytster]

You can find your axle ratio on the sticker that is located on the driver's side door pillar. Here is a link to what code matches what axle ratio Automotive What is my Ford rear end ratio, do I have positraction