clutch or gearbox ...HELP

Most likely the clutch.

If you can't get gears when the engine is switched off, then it is UNLIKELY to be the clutch.

A possible cause is one of the gear selector links, or even worse, the selectors in the gearbox...

If it's the clutch it'll make a bloody awfull noise when the engines running & you try & engage reverse. Or any other gear if you push hard

No synchro on reverse? Thought that unusual these days.

If you are sure you cannot select any gears with the engine off, then sounds like a gearbox fault to me.

Could be a selector or cable fault too (sure the clutch feels light?) the little r-clips that secure the outter cable on Megan's are a known fly-off-without-warning item.

Given it's a Renault, then really anything is possible...

Tim.

Even with the synchro it still crunches horribly if the clutch is stuck.

Sounds like a gear selector or remote linkages if the gearlever will not go in, even with engine off. Could be selectors inside gearbox or if lucky, linkages between the gearlever and box.

How can he engage reverse? He said he can't move the gearlever.

I can't see how a faulty clutch could make it impossible to select a gear

He said he can't select a gear. If he can't move the gear lever then the linkage is broken, but it's perfectly possible to be able to move the lever & not be able to select a gear.

Can't in my Mondeo without effort and the gearbox is OK...

Yawn...as I said before, you hadn't actually asked me.

So as you now have..pack it with vaseline as any fool knows. You can use gear oil but vaseline works better.

'06? Isn't it still under warranty?

Did you? I wouldn't know as I didn't bother reading any more of your worthless detritus in that thread.

I actually posted my answer before I'd got down as far as Dave Plowmans post. But you'll probably decide that I'm lying about that as well as it is more comforting to you than admitting a lorry driver knows more than you.

Whatever, f****it.

So how come you are replying here then, again you prove that you are a worthless liar...

Stop talking about yourself.

Face it Conor, by your own admission, you are a failed grease monkey...

Yawn.

I do wonder what sort of person replies to a 10 year old post...

A conker? Seems like a good description to me.

A 10 year old?

Tim