‘63 Valiant - steering shaft play

No power steering, automatic (no shift lever) - the attached diagram is the closest to what I I have. The play is all at the lower end of the steering shaft (19-15-4), inside the coupling. What is the likely culprit - worn "shoes" (19-15-44)? If I loosen the steering jacket clamp inside the passenger compartment, might it be possible to service the coupling and associated parts without disassembling the steering column?

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