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I bought my car used from a guy in town, it is an 08 GT manual. I was messing around with the tuner and saw that the gear parameters were set for 3.31s so I hopped out and checked under the car and sure enough I have a 3.31 sticker on my dif. Isn't the stock gears 3.55s? Did the guy replace the gears or is the 3.31s stock?