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Discussion Starter #1
Do you guys set your axle ratio or leave it at stock value? Same with tire size, if it is stock of course.

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I've done it both ways, doesn't seem to make any difference on my truck.
 

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Ive always had to set my revs/per/mile with my mpt tune,otherwise my speedo would be off. The tune was always 2 mph off according to gps and adjusting it under options I am able to get it spot on.
 
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