These are bearing numbers for 3/4-ton AND 1-ton trucks. The only difference between the two is that the later 1-ton uses a different seal than the later 3/4-ton. (1-ton seal numbers are in parens.)
'53 to '59
seal -- 5756 (40973S)
inner -- b46
outer -- b45
'46 to '52
seal -- 40973S (40973S)
inner -- b26
outer -- b25
A solution that works for a 1-ton is likely to also work for a 3/4-ton since they use the same axle and spindle.
Let's look into this some more.
Trying to find the spindle diameters for the two different year ranges of 3/4 and 1 ton axles.
So far I'm
guessing (by looking at section 6.3 in the 29-54 parts manual.)
That the older axle has spindle diameters of 1.40" and 0.84" (inner and outer respectively)
That the newer axle has spindle diameters of 1.5" and 7.8"
I've got a 52 axle I can drag out of the woods to dissemble and measure.
Who has the later one to measure?
Or can anyone confirm this from bearing numbers and dimensions?
With this info I can investigate swapping different hubs/rotors.
One problem will be the original bearings (older axle for sure) have an extended inner ring for the felt seal to fit on. Most modern axles use a machined portion of the spindle for the seal. If using the older spindles and new hubs a seal solution will be needed.
Grigg
