Sounds like you have a later than '52 rear axle if it has an open driveline. I believe a '52 3/4 ton still had an enclosed (torque tube) propshaft setup from the factory.
Like was said above a speedy sleeve on the pinion yoke should fix you up. You may have to pull the yoke and measure the diameter to get the right speedy sleeve. Also, when reassembling, a bit of sealer behind the nut helps to prevent oil from seeping thru the splines.


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.