Originally Posted by AGB_123

Yep - thats the best place to find out how to check.

Had mine up on a lift - 2 of us took a strong bar on front and back UJs and tried to 'flex' the VCU back & forth against each other - but it didn't shift a millimetre.

Does that sound like a valid way to check?

Personally - I think mine is Bu@@ered so have ordered a new one.......

However, anyone know how to check if the IRD has also been stuffed?

With the prop shaft off - gear in neutral - my IRD output cup can be rotated about 30mm before the crown wheel & pinion 'catch'. When it does it sounds like a bag of bolts being waggled back & forth - is this just a wide tolerance or more ominous?

I also get loads of vibration when accelerating from low revs and a huge juddering vibration when wound up to about 4000 rpm. Prop shaft is off now - but the vibes are even worse than before - clacking from the transmission is either IRD and/or a drive-shaft I think.

Jury is out on which it is or even if its both - any one-- any thoughts or comments.....