Noises from my rear

[jonbills]

My car has developed a noise at the rear, it's a bit like someone shaking a bag of marbles or stone chippings hitting the underside of the car. Seems to only happen when it's warmed up and seems roadspeed and load related - happens more if I'm above 50 or so and accelerating.
Any ideas what it is? I can't find anything loose or any play in the driveshafts (although I am **** at finding play in UJs).
Is it the diff? It's a 4 pinion open r200 - should be bullet proof I thought!

 

[Jimbo]

does it have oil in it?

 

[jonbills]

does it have oil in it?

I think so - I remember filling it 18m ago when I fitted it. I'll check the level tomorrow. Ta.

 

[Jimbo]

check all your fittings and bolts things like prop shaft bolts and wheel nuts.
if the prop shaft bolts were to come loose it could make that noise although generally that would make noise when not under load.
just something to look for while your under there

 

[jonbills]

Yeah I've had loose prop bolts before and it does sound very similar. I think I checked them last weekend, but maybe not - would be good if thats it.

 

[johnymd]

Something rattling around in the bellhousing?

 

[jonbills]

I've swapped out the left driveshaft and it's not doing it now. Fingers crossed

 

[jonbills]

Ok that wasn't it.
So I took everything apart - took the diff off, drained it and looked for loose bits. No. Took driveshafts and propshaft off again to check the UJs. No. Took the exhaust off and shook the silencers to check for french marbles. No. Put it all back together. It doesn't make the noise now.

On the upside, I made a tool to take the diff flange off with.

 

[uk66fastback]

So it's gone and you'll never know what it was!

Great looking tool that - ingenious.

 

[jonbills]

All my tools are top quality like that

 

[AliK]

So mr JB how did you get that number plate to not over hang and be legal? It's one of he warts on my Z's bottom I'd like to get rid of.

 

[jonbills]

From one of the shops mentioned in this thread: Black and White Number Plates

https://r.tapatalk.com/shareLink?sh...net/forum/showthread.php?t=26274&share_type=t

 

[AliK]

Thank you!

 

[jonbills]

Mr Fastback is right though, the letters need to be bigger. I'm sure std letters will fit. It's on my list to try again.