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Road speed calculator for all Fordson Major tractors
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Effective rear wheel diameter
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Height from floor to centre of rear axle
673mm
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Rolling Diameter
1,346m
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Rolling Circumference
4,228583712m
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Engine Speed
2100RPM
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Up to Serial No 08C 960337
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GearRatiosRoad Speed
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GearboxOverallKPHMPH
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1st6,62123,004,3322,692
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2nd4,787,36,1033,792
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3rd3,6868,47,7894,840
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4th2,61548,610,9636,812
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5th1,87534,815,3109,513
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6th1,04319,327,60617,154
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L.R.4,9191,15,8493,634
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H.R.2,7350,710,5096,530
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From 08C960337 - 4.375 : 1 Crown wheel & Pinion
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GearRatiosRoad Speed
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GearboxOverallKPHMPH
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1st7,82182,002,9271,819
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2nd6,04140,23,8002,361
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3rd492,885,7363,564
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4th3,0971,657,4364,621
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5th1,87543,5412,2377,604
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6th0,95822,2523,94614,879
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L.R.5,79134,53,9612,461
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H.R.2,9668,67,7674,826
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From 08C960337 - Optional 3.5 : 1 Crown wheel & Pinion
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GearRatiosRoad Speed
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GearboxOverallKPHMPH
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1st7,82145,603,6592,274
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2nd6,04112,14,7532,953
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3rd474,37,1714,456
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4th3,0957,329,2955,776
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5th1,87534,8315,2979,505
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6th0,95817,829,93318,599
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L.R.5,79107,64,9523,077
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H.R.2,9654,889,7086,033
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Source of Gear Ratio information:
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Genuine Ford Motor Company Repair Manual for Fordson Major, Power Major
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and Super Major Tractors
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