| 1967 Firebird Speedometer Gear usage Chart | ||||||||||||
| Driven Gear Or Sleeve | Tire Size | Speedometer Adapter | ||||||||||
| Rear End Ratio | Part # | Teeth | Color | E70 X 14 | 185R X 14 | Model | Ratio | Part # | Color | Trans Code | ||
| 3.08 | 3870351 | 17 | PURPLE | X | X | FH-FF | ||||||
| 3.23 | 3860341 | 18 | BROWN | X | X | FH-FF | ||||||
| 3.36 | 3860342 | 19 | NATURAL | X | X | FH-FF | ||||||
| 3.55 | 3987920 | 20 | BLUE | X | X | FH-FF | ||||||
| 3.90 | 3860342 | 19 | NATURAL | X | X | 777-F | .8653 | 535617 | BLUE | FH-FF | ||
| 3.90 | 9781826 | 19 | ORANGE | X | X | FX | ||||||
| 4.33 | 3860344 | 21 | RED | X | X | 777-F | .8653 | 535617 | BLUE | FH-FF | ||
| 4.33 | 3860033 | 21 | NONE | X | X | FX | ||||||
| Information supplied by George Pearson, taken from a Pontiac Parts Book | ||||||||||||