1935 Ford partnered with Marmon Herrington to convert 1.5 ton V8 powered trucks to all wheel drive, later following with .5, then one and 3/4 ton pickups. These conversions were convered under Ford warrenties.
Before that, in the 1920's, a fellow by the name of Jesse Livingood did the same for model T's. Even tried to partner with Ford, but Henry wanted the whole kit and caboodle or nothing. Funny that he would do this partnership with M-H later on.
Pardon me; but actually Ford built, in factory, a jeep using spicer axles, a 9N tractor engine, and model A transmission for military testing. Certainly not a conversion. Later, still between 1942-45 they built, in factory, a 1.5 ton low profile four wheel drive cargo truck. Again, not a conversion. So this question proves to have more than one answer. But, yes, in 1959 Ford built its first in house 4x4 for the civilian market.
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