Hy Chinito Quan, I rechecked my parts books, and I can find no reference to the p/n 187434 as far back as 1938. Chinito your rear axle housing is the old type, someone has torched the pivot plates off and turned it into a solid mount type. That being said I still think someone has swapped in a 55B - 59 1/2 ton differential [pumpkin]. Rather than looking through the parts books for part numbers, look at your old parts, there should be numbers on those, you may have to cross them over to something currently produced, but then you know you will be getting the parts that fit your paticular rear axle as it is currently configured. Lastly when you ask about a part, tell us where in the assembly the part is located, for example your differential has two pinion bearings, two differential side bearings, and two wheel bearings, some of the older differentials used one large bearing in front of the pinion gear, with a smaller support bearing behind the pinion gear, so please tell us which bearing in the assembly you are looking for. Good luck.
