| Here is a photo of the transfer case mounted shift unit, here shown on an FC-150. Photo courtesy of Craig Brockhaus' collection |
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| Here is a photo of the transfer case mounted shift unit, here shown on an FC-150. Photo courtesy of Craig Brockhaus' collection |
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The tables below were adapted from the Forward Control Service manual and show Power Take-Off shaft and vehicle ground speeds for all gear shift positions. These tables assume a T-90A 3-speed transmission and all speeds are in miles per hour (MPH).
| Governor Control Position |
Transfer In |
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Engine Speed | ||||||
| 1 | Low High | 357 357 | 2 6 | 644 644 | 4 10 | 1000 1000 | 6 15 | 1000 | ||||||
| 2 | Low High | 428 428 | 3 7 | 773 773 | 5 12 | 1200 1200 | 8 19 | 1200 | ||||||
| 3 | Low High | 500 500 | 3 8 | 902 902 | 6 14 | 1400 1400 | 9 22 | 1400 | ||||||
| 4 | Low High | 571 571 | 4 9 | 1030 1030 | 6 16 | 1600 1600 | 10 25 | 1600 | ||||||
| 5 | Low High | 643 643 | 4 10 | 1159 1159 | 7 18 | 1800 1800 | 11 28 | 1800 | ||||||
| 6 | Low High | 714 714 | 5 11 | 1288 1288 | 8 20 | 2000* 2000* | 13 31 | 2000 | ||||||
| 7 | Low High | 785 785 | 5 12 | 1417 1417 | 9 22 | 2200 2200 | 14 34 | 2200 | ||||||
| 8 | Low High | 857 857 | 5 13 | 1546 1546 | 10 24 | 2400 2400 | 15 37 | 2400 | ||||||
| 9 | Low High | 928 928 | 6 14 | 1674 1674 | 11 26 | 2600 2600 | 16 40 | 2600 |
| Governor Control Position |
Transfer In |
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Engine Speed | ||||||
| 1 | Low High | 357 357 | 3 6 | 644 644 | 5 12 | 1000 1000 | 7 18 | 1000 | ||||||
| 2 | Low High | 428 428 | 3 8 | 773 773 | 6 14 | 1200 1200 | 9 22 | 1200 | ||||||
| 3 | Low High | 500 500 | 4 9 | 902 902 | 7 16 | 1400 1400 | 10 25 | 1400 | ||||||
| 4 | Low High | 571 571 | 4 10 | 1030 1030 | 8 19 | 1600 1600 | 12 29 | 1600 | ||||||
| 5 | Low High | 643 643 | 5 12 | 1159 1159 | 8 21 | 1800 1800 | 13 32 | 1800 | ||||||
| 6 | Low High | 714 714 | 5 13 | 1288 1288 | 9 23 | 2000* 2000* | 15 36 | 2000 | ||||||
| 7 | Low High | 785 785 | 6 14 | 1417 1417 | 10 25 | 2200 2200 | 16 39 | 2200 | ||||||
| 8 | Low High | 857 857 | 6 15 | 1546 1546 | 11 28 | 2400 2400 | 18 43 | 2400 | ||||||
| 9 | Low High | 928 928 | 7 17 | 1674 1674 | 12 30 | 2600 2600 | 19 47 | 2600 |