ERF 'European' (1975)

tiptop495:
Hey, It had been possible to drive the test twice with the Daf, once as an 9 speed without using the splitter
and then as an 13 speed. .

I am really interested in this idea, Eric. I’ve always known that the 13-speed Fuller was just a 9-speed Fuller with overdrive. Was it really tested as a 9-sp with a 13-sp box? You could surely only test certain 13-sp set-ups as 9-sp 'boxes. Did that mean that you used low-range + high range using only upper-split gears, or low-range + lower split gears? This would surely depend upon whether it was an overdrive-top or direct-top 'box. I suppose it was easy with the overdrive 'boxes but what about the under-drive 'boxes (or is that another red-herring? Robert