I've decided to take a gamble and bought the ebay propshaft. Given the rarity of these used (4.2) and the cost of them new I considered it worth a punt.

Gamble unsuccessful. The shaft arrived missing part of the rear CV joint, which is the offending part on my own. Hmmm, never mind, they will take it back and refund me.
Onwards and upwards. :/

Well that's *&%$^ annoying. Good that they're going to refund you.

Quick question. Could a failing front wheel bearing cause vibration/shake at 60 mph + without any transmission through the steering.?

Hi People its been a while since I last posted on here, due in the main to Mrs Saff having been unwell. Thankfully things have improved now.

Back to the infernal vibration. It could be that I've just become used to it and subliminally accepted it as normal but I don't think so. What has happened is that the vibration appears to be road surface-affected,that is, going north on the M6 from junction 27 to junction 36, it is almost imperceptible. The return journey is vibration as usual. It doesn't seem to be coarse or smooth surface but the even-ness of the surface. This would seem to eliminate the propshaft as the culprit. I know issues don't just go away on their own but it really has improved. Unless I'm going barmey which is always a possibility. Any thoughts anyone?

I wouldn't know 'cos for that bit of southbound M6 I am just about to wake up, being nearly home.
I prefer to use Jct27 rather than Orrell.

Possible a flat spot on a tyre that is reducing as the tyre wears? Just guessing.

Hi Ray, I used that example as we have a static caravan in the south lakes so pound those roads quire regularly.

Hi Conan. I know, it's weird that a fault could actually improve over time/use. I agree that a 'wearable' like a tyre seems a possible culprit.

I had a similar problem some years ago. Vibration above 60 and worse the faster you go. Tried everything and nothing helped.

Then checked calipers. On one side one of the pistons was jammed slightly further forward than the others. When I got up to 60 the heat created expanded the metal and it touched the disc intermittently so was vibrating one side of the front of the car (but felt like whole car).

Got caliper refurbished and never had a problem since.