Driveline Options for the 2004 GTO

The following list contains the standard and driveline options for the 2004 GTO. The bold text for each option is used in the Top Speed Calculator. If your car is modified, use the closest match. You'll have a chance to make changes in the Top Speed Calculator page.

Select Engine for the Max RPM:

Standard LS1 (346cu in, 5.7L, V8, 350Hp, 6000RPM at redline)

Select Transmission for the Gear Ratios:

Standard 4-Spd Auto Floor Shift, Hydramatic 4L60-E M30 (1st 3.06:1, 2nd 1.63:1, 3rd 1.00:1, 4th 0.70:1, rev 2.33:1)
Optional 6-Spd Man Close Ratio, Tremec T-56 M12 (1st 2.97:1, 2nd 2.07:1, 3rd 1.43:1, 4th 1.00:1, 5th 0.84:1, 6th 0.57:1, rev 2.90:1)

Select Rear Axle Ratio:

  Engine   Trans  
  LS1 5.7L   Auto   Std
      Manual   Std

Select Tire Size:

Standard (P245 / 45ZR17)
Tires used on the GTO Autocross concept (P245 / 40ZR18)