RSamples

JUst want to put in my 2cents on the egr unplug issue. Just did trip to Cleveland and back to okc and with the egr unplugged I averaged 19.88 mpg. this is hand calc on four tanks. Also my egt's were down 300 degrees on average. What a difference for doing so little. I never got (even with the chip on lowest setting) more than 17.8 before. Have towed once since I was back and egt's were still down 300. Did not tow far enough to get a calc on the fuel but lie-ometer is showing more. Will have to wait on solid numbers while towing. Great gain for so little.

Does anyone know which #s on the vin tell you the axle ratio, and which is 4.10 or 3.73 ?