thanks frank54 and all others. i'm convinced it's either a u-joint or the torque tube bushing from what you all are telling me. if anyone has any hints, tips, tricks to pass along that make the procedure of getting into the tube and replacing this seal easier than the manual, i'd appreciate it. the manual is good, but doesn't always take the most direct approach to my particular problems.
thanks again
Overland Blue, 1953 GMC 1/2T, 100-22, 228/1bbl, 4sp/4.10 6v, shortbed/fender side/5-window.
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