Thanks for the offer igee, however I think we're talking about different parts. The unis are fine on my tailshaft, its
the centre CV (pretty sure thats what it is) after the centre bearing. It's got 6 bolts going through it and is a cylindrical shape about 3 inches wide.
When twisted, it rattles causing massive vibration that starts to become harmonic at about 80km/h. I think this is a CV as the transfer case does not have a slip joint to allow tailshaft extension/compression for engine movement. Please correct me if I'm wrong.
Thanks