I think the general consensus is that the worm gear rear end got a bad rap in this case, but there are a couple of factors where it contributes to rollovers: First, the center of gravity is higher with the worm gear than with a hypoid gear, due to the worm gear sitting above the axle. (I believe it was later moved below the axle, which would improve the CG.) The other thing about a worm gear is it doesn't like to be driven backwards; I've never driven a Fordson, but I suspect releasing the clutch in a rear-up wouldn't release the torque on the axle, so the inertia of the tractor might cause it to continue to rear up after releasing the clutch.
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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