1968 Ford Mustang Mechanical Information & Drawings
Automatic Transmission Shift Speeds (MPH)
| C-4 Transmission | |||||||
| AXLE Ratio | 2.80,2.83, 3.00, 3.89 | 3.20, 3.25,3.50 | |||||
| Throttle | Minimum | Maximum | Minimum | Maximum | |||
| Range | Shift | 1964 -70 | 1971* | 1964 -70 | 1971* | 1964 – 70 | 1964 – 70 |
| D1 | 1-2 | 7 – 11 | 9 – 11 | 28 – 47 | 37 – 52 | 8 – 10 | 26 – 49 |
| D1-D2 | 2-3 | 10 – 25 | 10 – 25 | 52 – 83 | 66 – 84 | 11 – 24 | 43 – 84 |
| D1-D2 | 3-1 |
11 Max |
—- | —- | 40 – 42 | 10 Max | —- |
| 3-1 | |||||||
| D1-D2 | 3-2 | —- | —- | 77 Max | 80 – 82 | —- | 83 Max |
| D1 | 3-1 | —- | 10 – 11 | 40 Max | 40 – 42 | —- | 33 Max |
| 2-1 | —- | 32 – 45 | 40 Max | 40 – 42 | —- | 33 Max | |
| Low | 2-1 |
29 Max |
—- | —- | —- | 32 Max | —- |
| C-6 *302 2bbl Engine, 3.00:1 Axle, F78X14 tires | |||||||
| AXLE Ratio | 3.00:1 | 3.50, 3.20, 3.25:1 | |||||
| Throttle | Minimum | Maximum | Minimum | Maximum | |||
| Range | Shift | 1964-70 | 1971** | 1964-70 | 1971** | 1964-70 | 1964-70 |
| D1 | 1 – 2 | 7 – 13 | 7 – 8 | 38 – 45 | 46 – 52 | 6 – 12 | 35 – 51 |
| D1 – D2 | 2 – 3 | 11 – 21 | 7 – 18 | 72 – 82 | 78 – 86 | 16 – 20 | 66 – 84 |
| D1 – D2 | 3 – 1 3 – 2 |
9 Max | 7 – 8 | —- | —- | 9 Max | —- |
| D1 – D2 | 3 – 2 | —- | —- | 73 Max | 66 – 77 | —- | 75 Max |
| D1 | 3 – 1 2 – 1 |
—- | —- | 34 Max | 34 – 41 | —- | 40 Max |
| Low | 2 – 1 | 9 Max | 22 – 30 | —- | —- | 9 Max | —- |
| Ford-O-Matic (1964 – 70) **351 4bbl, 3.00:1, F78 x 14 tires. | |||||||
| AXLE Ratio | 3.00,3.10, 3.20, 3.25:1 | 3.50, 4.00:1 | |||||
| Range | Shift |
Throttle |
|||||
| Minimum | Maximum | Minimum | Maximum | ||||
| D | 1 – 2 | 12 – 19 | 45 – 60 | 10 – 16 | 36 – 52 | ||
| D | 2 – 1 | 16 Max | —- | 14 Max | —- | ||
| D | 2 – 1 | —- | 59 Max | —- | 51 Max | ||
Mustang Fan Blade Information
In 1968, the Mustang 289 and 302 engines were the only two engines to receive a flex fan. In order to get the flex fan, the cars had to be eqquipped with air conditioning. The number stamped on the fan is C8SE-B. The fan had 5 blades, was 17.5 inches in diameter, was 2.5 inches high when unflexed and used a water pump pulley ratio of 1.13:1.
| Engine | Cooling package |
Clutch part number |
Fan assembly part No. |
Water pump to pulley ratio |
Engine RPM required to run water pump at 2000 RPM |
FAN TEST SPEED @ 200 WATER PUMP RPM | |
| Max slip (cold) |
Min. Slip (hot) |
||||||
| 390 | A/C | C8OE-B | C8OE-B | 1.10:1 | 1818 | 1500 | 1650 |
| 390 | Std./Ext. | C8OE-A | C8OE-B | 1.25:1 | 1600 | 1500 | 1650 |
| 427 | Std. | C8OE-B | C8OE-B | 1.10:1 | 1818 | 1500 | 1650 |
Diagrams & Drawings
Typical Front wheel assembly for Mustangs between 1965 and 1973. 6 cylinder is shown V8 is similar.
