XCal 2 Gear Ratio Question

Everyone,
Is there any way to use the SCT X-Cal 2 to change the gear ratios w/out having a 'custom tune'. I'm returning my car to stock, and when I put it on the 'stock tune' it doesn't seem to give me the adjustability to swap gear ratios to correct my speedometer...the other problem is that I can't leave the custom tune on my car because I'm selling my supercharger and the car won't run right if it thinks I'm forcing all that air into the engine.

Any help?
 
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