Instruction books
David
A quick flick through some of my books has netted the following:
Chevrolet D, M & R July 1941 (this is marked second )
Chevrolet D, M & R July 1941 (this is marked third edition)
Ford 'built for British war office' D, M & R Third edition (no dates on Ford early books but as this shows 3rd type cabs as well this would be early 1942 I guess).
By just quickly flicking through the relevant sections I can't see any differences in the schematics.
I have found that the D, M & R books can be misleading as the same picture seems to be reused particularly before the MB F or C series manuals.
I would suggest the best way to track down the information you are looking for is to go to the parts lists although these too should be treated with some caution.
In the Chevrolet parts list No 197 August 1942
Covering 1940 to 1942 CMP vehicles covering 8,15,15A,30,3 ton and FA gun tractors
There are two part numbers listed for transfer cases in the section covering 30, 3 ton and FA gun tractors these are as follows: 180#### and 181####
With the not unusual addition to the text which reads when stock is depleted use 5266###.
The only variation to this is the CGT which reads 1810065 when stock is depleted use 1810340.
Alex is the man to have this information at his finger tips.......... but it may suggest the above indicates the 180 and 181 numbers are not GM part codes
Pete
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