| 1969 Tempest & GTO And Grand Prix Speedometer Gear usage Chart | ||||||||||||||
| Driven Gear Or Sleeve | Tire Size | Speedometer Adapter | ||||||||||||
| Rear End Ratio | Part # | Teeth | Color | 7.75 X 14 | G78 X 14 | 8.25 X 14 | G70 X 14 | F78 X 14 | Model | Ratio | Part # | Color | Trans Code | Drive Gear Teeth |
| 3.08 | 3860342 | 19 | NATURAL | X | 540474 | NONE | FO | 7 | ||||||
| 3.08 | 3870351 | 17 | PURPLE | X | X | FO | 7 | |||||||
| 3.23 | 3870351 | 17 | PURPLE | X | X | X | X | FO | 7 | |||||
| 3.36 | 3860341 | 18 | BROWN | X | X | X | X | FO | 7 | |||||
| 3.55 | 3860342 | 19 | NATURAL | X | X | X | X | X | FO | 7 | ||||
| 3.90 | 9780522 | 18 | GREEN | X | X | X | X | X | FT | 6 | ||||
| 4.33 | 3860329 | 20 | YELLOW | X | X | X | FT | 6 | ||||||
| Information supplied by George Pearson, taken from a Pontiac Parts Book | ||||||||||||||