New gears and speedometer error

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07-23-2013, 10:41 AM

portstangly23

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Join Date: Jan 2013

Location: ON

Posts: 37

New gears and speedometer error

Can you guys tell me what the approximate difference will be in speedo when changing from stock gears to 373s in my 2002 gt? I want to wait on the programmer until i have the cash in hand.

07-23-2013, 12:22 PM

cliffyk

TECH SAVANT

Join Date: Dec 2006

Location: Saint Augustine, FL

Posts: 10,938

3.73/3.27 = 1.14. So the speedometer will read 14% higher than actual speed with the 3.73s. Indicated 70 will be an actual speed of 61.4...

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