I have had the diff on my 1929 DA apart for sometime.
I realised on re-assembly that the domed 'banjo' cover can go back in any of a dozen orientations. I want to set the oil filler hole at the correct level, so can someone say at which height the filler plug should be?
Imagine the banjo as a clock face (from the rear of the car) .... Does the filler plug go at 3 o'clock, 4 o'clock or 5 o'clock?