The markings on the ring gear: First is the date of manufacture 5-04-73, second is a part number, third is the number of ring gear teeth and pinion teeth (47 11). Divide the two and you get the gear ratio, 47/11=4.27:1 which was optional on 72-75 CJs.
To remove the axleshaft pop the rubber or plastic cover off that circle on the left side of the flange in your first picture. Through that hole insert a socket and extension to reach the six nuts behind the flange which hold it all on. Once the nuts have been removed you can remove the axleshaft/bearing/bearing retainer assembly. There are no c-clips on a Dana 44.
Download the factory service manual for your '74 here: http://oljeep.com/edge_parts_man.html