After a thorough research, thanks to 3B slaping me awake, I found some interesting info, I'll appreciate any corrections or advice. 3B was correct regarding the chassis, it is a 47-53 1/2 ton. Thanks to the help of many guys here I narrowed it to a '49.
According to the later, the front wheel bearings part No. are:
a) If found separate: Inner: 909702 for cage, 909552 for cone and 909602 for cup. This data was taken from a 1939-1953 MPB. On a 1947-1954 MPB, same numbers. No number for the whole bearing. For outer: 909701 for cage, 909501 for cone and 909601 for cup.
b)In the 1955-1960 MPB, the numbers are the same, but there is also the number for the whole bearing: 909052 inner, and 909001 outer, just like 3B said. Also there are some other p/n for the cup and the cone e.g. 909067,909767,909567.
I'm happy with the No. given by 3B which is the whole bearing. Now regarding this bearing, the original one has balls in the cage. The cone and the cup makes it a thrust bearing (tappered). Ball bearings are supposed to be for radial loads, while tappered (usually rollers) are used for axial loads as well. It seems the bearings in question are tappered, but have balls in it. The question that arose is, will I find the bearing exactly as it is (with balls), or the new ones will come with rollers and will function equally well, using the part number given by 3B?
Now to the rear end. Here it gets a little bit more confusing. The rear transmission of my truck appears to be 55 2nd up, since it is an open one. Just to rule out the possibility: is it possible to have a GM type rear axle with torque tube and just change the carrier (pumpkin) with an open one type? Which year did the open transmission appeared? The preceding question came, because checking on the 39-53 MPB, there is just one p/n for pinion bearings, but on the 47-54 there are 4 different, one for 1940-1947, another for 1948 and up but before a certain serial number (100-22-36732), another for models after the given serial but before serial (100-24P-Z15410) and the fourth for models beyond the above. If a torque tube transmission differential cannot be half changed, I mean, just the pumpkin, apparently my rear axle is a H-033 (please see photos)
Pumpkin 1 Pumpkin stamping, well it pretty much narrows the pinion bearings to the numbers 3B gave. If not, God have mercy of me. I'll appreciate any feedback. I'll bore all of you again later with the rear axle bearings.
Have a Happy Haloween.
