Having done a manual conversion there is a vibration around 2000 revs coming from under the car, then it goes. Changed the oil but still there, could i have connected the middle of the shaft together one wrong. i remember reading when rejoining it that they should have be marked so the when reconnected the balancing was maintained? Otherwise the is a 50/50 chance of it being the wrong around.

Did you change the front half of the prop to a manual one?

Yes so not sure if the balancing is out now

Don't know then mate, I guess you could try splitting the prop again and turn one end round then bolt it up again.

Think that may be my next move but to cold at the moment!!

Have you checked the AFM for damp? When mine got damp it was causing the car to vibrate. Just a thought.

That's newly changed for other reason and no change. i'm thinking bearing or prop balance

That's newly changed for other reason and no change. i'm thinking bearing or prop balance

 

sounds like it..

Try turning the two parts of the prop around 180 and rejoin them see if it clears up. Is the rubber around the centre bearing in good condition as this can cause vibration too.

is it at 2000rpm regardless of gear?

Pretty much, worse 3rd and 4th tho

Pretty much, worse 3rd and 4th tho

 

that's weird, if it was the prop you'd expect it to be related to road speed not engine speed.