overdrive transmission level question

[Alaska Jim]

Hi Guy's, I just reinstalled my 3sp. o/d trans in my early '51 Merc. I filled the overdrive section of the trans. to the top of the fill plug, then I filled the main section of the trans to the top of the fill plug. I then let the car sit level overnight and rechecked the main section of the trans the next afternoon. It was still at the full level, just coming out of the filler hole. I then started the car and slowly let the car idle in each gear on jack stand for a few minutes to lube all the bearings etc. I have the car still up on stands and will check the fluid level again tomorrow. I know that the oil will travel between the 2 sections of the trans, but my question is how long will it take to "even out" so I do not have to worry about starving the o/d section. how long should I wait to check the main section and be sure that both sections are full before I drive the car. I do not want to pull this trans out again. any advice will be appreciated. Thanks, ---- Jim