ahardb0dy Posted May 10, 2010 Share Posted May 10, 2010 I was thinking my speedometer was a little fast as the truck doesn't seem like it is going as fast as what the speedometer is saying. I figured it was correct as the truck still has the stock sized tires, but than I realized my buddy had the tranny replaced, so now I have no idea what this tranny came out of and if the speedometer gear is correct for my axle gear ratio. Wanted to know if someone with 31's, 4:63 gears and an auto tranny could tell me what there speed is at 2000 RPM, mine is reading 60 with the OD on and in top gear. Also is there a way to tell by looking at the speedometer gear which one it is? Thanks Link to comment Share on other sites More sharing options...
GrimGreg Posted May 10, 2010 Share Posted May 10, 2010 Easiest test is to run a GPS and compare. Link to comment Share on other sites More sharing options...
ahardb0dy Posted May 10, 2010 Author Share Posted May 10, 2010 have to find someone that has one, thanks for the idea!! Link to comment Share on other sites More sharing options...
ZombeeXXX Posted May 10, 2010 Share Posted May 10, 2010 (edited) Even easier way is to time yourself between mile markers with a stopwatch. 60 mph/kph = 60 seconds per mile/kilometer. Each second over up to 5 counts as a mile/k slow. Under 60 seconds, you are speeding. Also i believe the speedo gears are color coded. Edited May 10, 2010 by ZombeeXXX Link to comment Share on other sites More sharing options...
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