Atlas gear box NA9113

I have a NA9113 gear box in my 1965 Atlas. I have 2 questions
is this the original gear box?
Were is the oil level plug located?

Atlas gearbox numbers bear no resemblance to engine or frame numbers. The only way to determine if the GB is original, is to apply to NOC for Dispatch Record.
See https://andover-norton.co.uk/en/shop-drawing/516/gearbox# for drawing of GB to find oil level plug.(#65 call out)


Evidence that yours may be original is the fact that the prefix letters in the number were used post 1964.(IIRC)

Slick

texasSlick said:

See https://andover-norton.co.uk/en/shop-drawing/516/gearbox# for drawing of GB to find oil level plug.(#65 call out)

Click to expand...

Level plug is at #85.

FYI you can fill to level without removing the plug. You can see the inside of the level plug entry hole by looking through the gearbox inspection cover. Obviously when you fill give the oil time to spread throughout the box and check several times.