Driveline Options for the 1970 GTO

The following list contains the standard and optional driveline options for the 1970 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 350hp (400cu in, V8, 1-4bbl, 350Hp, 5000RPM at Max Hp)
Optional Ram-Air III (400cu in, V8, 1-4bbl, 366Hp, 5100RPM at Max Hp)
Optional Ram-Air IV (400cu in, V8, 1-4bbl, 370Hp, 5500RPM at Max Hp)
Optional 455cu in(455cu in, V8, 1-4bbl, 360Hp, 4300RPM at Max Hp)

Select Transmission for the Gear Ratios:

Standard 3-Spd Man Column Shift (1st 2.42:1, 2nd 1.58:1, 3rd 1.00:1, rev 2.41:1)
Optional 4-Spd Man Floor Shift M20 (1st 2.52:1, 2nd 1.88:1, 3rd 1.46:1, 4th 1.00:1, rev 2.59:1)
Optional 4-Spd Man Close-Ratio Floor Shift M21 (1st 2.20:1, 2nd 1.64:1, 3rd 1.28:1, 4th 1.00:1, rev 2.27:1)
Optional 3-Spd Auto Column/Floor Shift (1st 2.48:1, 2nd 1.48:1, 3rd 1.00:1, rev 2.08:1)

Select Rear Axle Ratio:

  Engine   Trans  
3.07		  
3.08		  
3.23		  
3.31		  
3.55		  
3.90		  
4.33
  Std 350hp   3-Man   .   Opt   Opt   .   Std   Opt   Opt
      3-Man w air   .   Opt   Std   .   .   .   .
      4-Man   .   Opt   Opt   .   Std   .   .
      4-Man w air   .   Opt   Std   .   .   .   .
      4-Man Close   .   .   .   .   .   Opt   Opt
      3-Auto   .   .   Opt   .   Std   Opt   Opt
      3-Auto w air   .   .   Std   .   .   .   .
  Ram-Air III   3-Man   .   .   Opt   .   Std   Opt   Opt
      3-Man w air   .   .   Std   .   .   .   .
      4-Man   .   .   Opt   .   Std   .   .
      4-Man w air   .   .   Std   .   .   .   .
      4-Man Close   .   .   .   .   .   Opt   Opt
      3-Auto   .   .   .   .   Std   Opt   Opt
      3-Auto w air   .   .   Std   .   .   .   .
  Ram-Air IV   4-Man Close   .   .   .   .   .   Std   Opt
      3-Auto   .   .   .   .   .   Std   Opt
  455cu in   3-Man   .   .   .   Std   Opt   .   .
      4-Man Close   .   .   .   Std   Opt   .   .
      3-Auto   Std   .   .   Opt   .   .   .

Select Tire Size:

Standard fiberglass belted whitewall G70x14 (P225 / 70R14)
Optional fiberglass belted dual whitewall G70x14 (P225 / 70R14)
Optional fiberglass belted white lettered "billbord" G70x14 (P225 / 70R14)