Columbia Lubrication

[SoCalCoupe]

Trying to install a Columbia 2-speed made for a Zephyr in my '41 Ford. The Columbia manual says "Keep lubricant up to NEW oil level hole in the OVERDRIVE AXLE at all times....CAUTION: DO NOT USE FORD OIL LEVEL."


I can sort of see a line on the Columbia unit that's above the bottom of the Ford fill plug. In pictures I've seen of installed Columbias, there's a fill plug in the Columbia unit, just outboard of the Ford fill plug, that corresponds to the 'fill line.'


I'm 100% certain there's no fill plug in my Columbia. Anyone come across this before? Do I need to remove the Columbia and have a fill plug hole drilled and tapped.


I'm quitting this project for today. No sense in continuing assembly if I'm just going to have to pull it apart again.