There is a story (my Dad told me) that Rolls Royce took the part from General Motors and refined it by polishing surfaces and otherwise correcting what they tho

There is a story (my Dad told me) that Rolls Royce took the part from General Motors and refined it by polishing surfaces and otherwise correcting what they thought were manufacturing defects. But after the refinement, the transmission no longer worked! There was no longer sufficient friction inside the mechanism to transfer the mechanical energy.