Thread: 3.90 gearing?
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Old 04-23-2013, 07:12 AM   #3
Vertigo_GT
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Join Date: Apr 2013
Vehicle: 2004 GT Convertible
Location: Viera, FL
Posts: 216
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I'm interested inn 3.90 gears too. Same car, mild mods and driving profile as 04Blue281 except mine is an auto. Also, if I get a tuner which would firm up shifts, would a shift kit make much of a difference, or would I be better off spending my money on a TB/Plenum upgrade?
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