On Thu, 13 Dec 2018 13:34:29 -0800 (PST), Part timer
wrote:

Lotus Elan on Wheeler Dealers - between rear differential and wheels. They went for CV joints as an upgrade for replacement.

That's a rotoflex coupling (as also used on the Hillman Imp)

A rag joint uses a flat sheet of reinforced rubber and cloth and was usually
used on the likes of steering column joints to provide some small degree of
articulation
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