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A true universal joint would be a complete unit that replaced the factory coupling and therefore the bushes too.
The coupler's made by Fabcar, Stromski, TimT's unit and our own Wevo coupler are all true universal joints.
An interesting derivitive of Bill's unit would be to add just enough slot to the holes to allow a minimum of freedom on the second plane and keep a minimum of lost motion fore / aft, then the low wear, high precision advantages of the brass would still be faithful to the factory intent to allow some misalignment.
Bill clearly states his choice to accept any (if any) detrimental effects of his solution.
Those who go to a true universal joint are choosing precision over possible noise and vibration.
If acceptance of any potential pitfalls, either potential noise, vibration or assumed tranmsission damage are a concern, then new factory bushes are still going offer the best of what the factory decided was adequate to satisfy their own design brief.
This thread proves not only do the factory parts wear out, not all drivers feel the factory solution was totally satisfactory.
Regards
Hayden
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