Re: TT truck year id
When Ford Shut down the Model T, they started a process of building up the Rouge and changing what was going on at Highland Park. Ford leased out a good part of Highland Park to Briggs Manufacturing Co so they could build bodies. The tractor manufacturing moved from the Rouge over to a part of Highland Park. All of the interior trim for the model A cars was made on a line at the Highland Park plant and all of this happened withing a few months. When they stated that they shut down model T production May 26th, I sort of take them at their word. The production of the Model TT was well less than half of 1926 production which would also indicate a shut down in Mid 1927 after the 15 millionth T was produced.
Ford moved model T engine production to the Rouge in 1924 so that line didn't have to totaly shut down but they only made a little under 170K engines from May of 1927 till August of 1941. I think they just scaled back production as needs required and new space was needed for the model A production. I don't know for sure but I would figure pretty good odds that the 40HP model A engine switched over to the same place in the Rouge where the model T engines were still being built up after model A production ceased in 1931. Ford produced the 20HP T engines and the 40 HP A engines for basic powerplants for any number of different applications as well as replacement parts. Ford likely outsourced the castings as soon as a particular engine was no longer in large scale production. They made 15 million model Ts so there were plenty still in service before WWII began. The war changed all that to a point where all they could do was build equipment for the War Department just like all the other auto manufacturers.
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