1965 Pontiac Tempest & GTO Speedometer Gear Usage

Information supplied by George Pearson
1965 Tempest & GTO Speedometer Gear usage Chart
  Driven Gear Or Sleeve Tire Size Speedometer Adapter  
Rear End Ratio Part # Teeth Color 6.95 x 14 7.35 x 14 7.75 x 14 8.15 x 15 Model Ratio Part # Color Fitting & Seal Assy
3.36 3987920 20 BLUE     X X          
3.36 3860344 21 RED X X              
4.33 9781826 19 ORANGE     X            
3.90 9780523 17 BLACK     X            
3.90 9780522 18 GREEN   X              
3.55 3860344 21 RED   X X            
3.08 3860341 18 BROWN       X          
3.08 3860342 19 NATURAL   X X            
3.08 3987920 20 BLUE X                
3.23 3860342 19 NATURAL     X            
3.23 3987920 20 BLUE   X              
3.23 3860344 21 RED X                
 
Information supplied by George Pearson, taken from a Pontiac Parts Book