Originally Posted by Jmusc16
It's an auto with 3.31 gear ratio
Sent from my iPhone using Mustang Evolution
As an auto, that's all the more reason you should correct your speedometer.
Not entirely sure how much of an impact it will have on your shifting
, the fact that your cars computer thinks the car is traveling 6% faster then it actually is.
The cars computer relies on several sensors to decide when and how to shift.
• Input shaft speed sensor - Engine speed on the transmission side of the torque converter
• Output shaft speed sensor - Road speed
• Throttle position - How far the accelerator is pressed
• MAP sensor - Engine intake vacuum, which is a function of throttle position and engine load.
• Temperature - Shift firmness varies based on transmission temperature to account for the fluid's properties over the wide range of operating temperatures.
All I know about your car so far is that it's the Pony Package, has 3.31 gears and some nice looking new wheels and tires.
Should seriously consider correcting your speedometer, either by a Speedometer/Odometer Recalibration Programmer or a Tuner. Of course you run the chance of warranty coverage on anything that the tuner could be blamed for causing.
EDIT: a tuner would definitely improve on your 0-60 time.