ok when i bougth the car the guy said that the car has gears in it 373 but im not sure about it when i drive 80 mph on 5th gear the rpm are at 2500 it is 2000 gt how can i find out it has cobra wheels on it 245/40/18 please help
Jack the car up at the back, take it out of gear/emergency brake off, then rotate the wheels and count the number of revolutions on the driveshaft to turn the wheel once. Use chalk or paint stick to mark the tires and driveshaft if you have having trouble. That will give you your ratio.
Example: Wheel turns once, Driveshaft turns 3.73 times, you have 3.73:1 gears. Stock would be 3.27
Jack the car up at the back, take it out of gear/emergency brake off, then rotate the wheels and count the number of revolutions on the driveshaft to turn the wheel once. Use chalk or paint stick to mark the tires and driveshaft if you have having trouble. That will give you your ratio.
Example: Wheel turns once, Driveshaft turns 3.73 times, you have 3.73:1 gears. Stock would be 3.27