The later boxes must be different than mine. The '36 box has a grease zerk on it. No way to pour anything in, unless I remove the zerk and try to pour into that small hole. I checked the manual, and the zerk is factory. It says to use a pressure gun with "steering gear or chassis lubricant". I just don't know what's available today that is compatible to who-knows-what was used over the past 90 years.
