1940 CMP developments

[David_Hayward (RIP)]

I believe that at long last I have traced the likely development of the 4-wheel drive pilot DND-pattern trucks. This is because of a careful re-reading of the DND papers from 1939-40 and also a lucky break thanks to W & T that I just happened to find by coincidence very late last night in a copy sitting next to me on the floor! Yes, after all these years! Thanks are due yet again to the late Mr Vanderveen.

May I appeal please for any advice on what engineering was required to adapt the F60H chassis, with its rear bogie, from the C60L? The photo of a F60H wrecker in W & T on CMP WRECKERS shows that they used initially at least Chevrolet front axles, and therefore Chevrolet rear axles. By the way, that's not the photo referred to in the previous paragraph!

Further, I need some photos of early GM/McKinnon transfer cases and those fitted to early F15A and say either FGT, F30, or F60 chassis? Likewise 1940 Marmon-Herrington cases? Alternatively proof either way that early Ford 4 x 4 and 6 x 4 chassis other than the F15A used GM cases, and the same viz-a-vie F15A. I lack an early Chevrolet Service Book and so although I have cut-away drawings of the two Ford cases, one for F15A [single-speed] and one for the others, I have nothing to compare with the GM version[s].