| 1970 Firebird Speedometer Gear Usage Chart (Turbo 400) | ||||||||||||
| Speedo Driven Gear | Tire Size | Speedometer adapter | ||||||||||
| Rear axle ratio | Part No. | Teeth | Color | F60 X 15 | F70 X 14 | F78 X 14 | E78 X 14 | Part No. | Color | Sleeve & seal assy. | Trans code | Drive gear teeth |
| 3.07 | 1359273 | 39 | BROWN | X | X | 1362294 | PX/PF | 16 | ||||
| 3.07 | 1359272 | 38 | BLUE | X | X | 1362294 | PX/PF | 16 | ||||
| 3.31 | 1362049 | 42 | GREEN | X | X | 1362293 | PX/PQ/PF | 16 | ||||
| 3.31 | 1362195 | 41 | YELLOW | X | X | 1362293 | PX/PQ/PF | 16 | ||||
| 3.55 | 9775187 | 45 | LT BLUE | X | 1362293 | PQ | 16 | |||||
| 3.55 | 9780470 | 44 | DK GREY | X | 1362293 | PQ | 16 | |||||
| 3.73 | 1362195 | 41 | YELLOW | X | 535617 | BLUE | 1362293 | PQ | 16 | |||
| 3.73 | 9775187 | 45 | LT BLUE | X | 1362293 | PQ | 16 | |||||
| Information supplied by George Pearson, taken from a Pontiac Parts Book | ||||||||||||