Paul they upgraded em to 6 lug sometime along the way. That is a 2 1/2 ton. All of the 5 tons had vertical exhaust from sometime in the 60's while the 2 1/2 ton didn't get vertical exhaust unless it had the deep water fording stack or until the "clean air" engine upgrade was installed stating in the 80's. The "clean air" was only installed on the multi fuel engine failure or the truck went through depot level rebuild. There were duce drivers all over the place deliberately trying to blow up their engines to get the new diesel only turbocharged clean air engine. Then a few short years later the cold war was over and the military went through the "peace dividend" draw down. The Army had enough new model 5 tons that they purge the duce in favor of the 5 ton at all levels.
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Today's Featured Article - Tractor Profile: Allis-Chalmers WD45 (Gas Version) - by Staff. Beginning production in 1953, the WD45 had the same general look as the WD tractor which was produced earlier - but was much more powerful. This was due to the new 4-cylinder "Power Crater" gasoline engine with a 4 x 4-1/2 inch bore and stroke. Some people feel this was one of the most significant tractors offered by Allis-Chalmers in those days. Nothing in its weight or power class could match its performance. In 1954 they began offering the WD45 with the new "Snap-Coupler&quo
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