The ring gear is bolted to the differential and the pinion gear is inside this assembly with its shaft exiting the housing to mate with the driveshaft yoke. Always replace a ring-and-pinion as a set; they are manufactured and lapped to each other as a matching set.
Those pictures were taken over the course of a few days. You can pretty much watch this happen. But now it will take another two months or so, depending on the temperature, for the fruit to fill out and finally ripen. A banana plant takes about 9 months to grow up and produce a bunch of bananas. Then the mother plant dies. But around the base of it are many suckers, little baby plants. At the base of a banana plant, under the ground, is a big rhizome, called the corm. The corm has growing points and they turn into new suckers.
Time to Fruit. The time from initial planting to fruit set varies. Pineapples grown outside in the optimum climate can set their first fruit in as little as 16 months. Indoor plants may take 16 to 24 months, or longer, before they flower and form their first fruits. The type of planting also impacts the time to first fruit. Sucker-grown plants usually fruit earliest at around 16 months, slips may take 24 months and a crown can take up to 28 months. Ratoon fruits usually begin growing off the side shoots within a year, although they may take longer.