I had earlioer posted the speedy-sleeve part number. Look up in my name. I also have been told dodge used three different types of axles our first gen trucks. Also if you have the old seal that the part number is still readable Napa can trace it to the correct speedy-sleeve and provide Napa with your VIN they can also research parts for your particular truck! All this being said the parts guy you talk to must know what he is doing.
This is not covered in the dodge book I found out by extensive research. Your leak around the outside drum is because there is two pieces (hub and brake drum) leaking in between. Remove the studs with a brass punch and separate hub and brake drum then clean and block sand both pieces 400 grit then clean, clean. Use high-temp RTv get at wal-mart. Put back together. Problem cured.
Does anyone know of a ARP high strenght rear wheel-stud 1/2 dia or upgrade to 9/16 inch dia. Any comments on this?