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Barreti

Original Poster:

5,608 posts

124 months

[news] 
Sunday 5th August 2012 quote quote all
Hi chaps,

Out for a run in the Griff this morning and very near home I pulled away from lights to hear a bang and a lot of clattering.
I took it gently for the last mile to home but it was clattering like buggery under load and it sounds like its from the back end.
The engine is running OK.

The exhaust is off and the back wheels in the air but I can't find anything wrong with the prop or the drive shafts by just pulling and turning them.

After lunch I'll try starting it and make sure there are no noises out of gear, then drop it into gear and see what I can hear.

Any ideas?

Thanks
IanB

7erbera

353 posts

84 months

[news] 
Sunday 5th August 2012 quote quote all
Maybe drive shaft?

How hard was the pull away from the lights?

Ant.

5,180 posts

168 months

[news] 
Sunday 5th August 2012 quote quote all
All CV joints ok? Might be hidden by the gaiter....

carsy

2,075 posts

52 months

[news] 
Sunday 5th August 2012 quote quote all
If its at the rear i am guessing cv. Hope its nothing more major.

Biggles101

193 posts

48 months

[news] 
Sunday 5th August 2012 quote quote all
If not CV joints then will be Diff somewhere. Hope it's not expensive.

Matt
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Barreti

Original Poster:

5,608 posts

124 months

[news] 
Sunday 5th August 2012 quote quote all
Thanks for the fast replies guys. I expected everyone to be out and about in the sun biggrin

Well the good news is there is nothing in the diff oil.

It was a hard pull away - trying to keep up with my mate in his Chimaera who suddenly seemed to have his driving head on.

There is nothing obvious with the car on stands and turning the wheels.
We've also checked the brake calipers are still properly attached - a good call by my mate that one but unfortunately not the problem.

How do I check the CV's ?

What I was going to do next was fill the diff and take it for a run with a mate in the car so he can try to find the source while I concentrate on not driving into something.

So that gives you an hour to come up with ideas for us.

Thanks again guys. Its nice to know we have each others backs covered.

rfisher

3,134 posts

170 months

[news] 
Sunday 5th August 2012 quote quote all
Have a good look around the chassis - diff housing mounts especially.

May have cracked a member, so to speak.

Simon says

11,482 posts

108 months

[news] 
Sunday 5th August 2012 quote quote all
Loose road wheels?

Barreti

Original Poster:

5,608 posts

124 months

[news] 
Sunday 5th August 2012 quote quote all
Ha ha.
You clanger wink I'm not that thick!

Actually, here is a thought.

Throughout the drive I had a horrible vibration through the car. Again, I thought this was from the back end(ish) but I put it down to the exhaust touching the chassis somewhere because I'd just had the exhaust off.

Was this a symptom too and nothing to do with the exhaust I wonder.

GAjon

1,916 posts

100 months

[news] 
Sunday 5th August 2012 quote quote all
Exhaust internal baffle?

Ant.

5,180 posts

168 months

[news] 
Sunday 5th August 2012 quote quote all
Barreti said:
Ha ha.
You clanger wink I'm not that thick!

Actually, here is a thought.

Throughout the drive I had a horrible vibration through the car. Again, I thought this was from the back end(ish) but I put it down to the exhaust touching the chassis somewhere because I'd just had the exhaust off.

Was this a symptom too and nothing to do with the exhaust I wonder.
maybe.
Cv boot split? All cv grease lost, cv runs dry and now gives up?

Simon says

11,482 posts

108 months

[news] 
Sunday 5th August 2012 quote quote all
Ok then how about loose exhaust silencer mounting plate scratchchin

Barreti

Original Poster:

5,608 posts

124 months

[news] 
Sunday 5th August 2012 quote quote all
Simon says said:
Ok then how about loose exhaust silencer mounting plate scratchchin
Nope.
I'd been using these bolts to play with when I wanted to test my 'new' Mac Tools air ratchet biggrin
So they were all tight and were still tight when I took them off to drop the exhaust.

I can't get diff oil now, so taking it for a run is out.

So, taking on-board what Ant says, I'm going to trot down and have a look at the CV gaiters and make sure the drive shaft bolts are all still present and correct.

Back in a bit with an update...

5.0ltr

2,087 posts

86 months

[news] 
Sunday 5th August 2012 quote quote all
Initial thought was rear spring snapping off part of the coil, did the noise continue after the `bang?`

blaze_away

373 posts

100 months

[news] 
Sunday 5th August 2012 quote quote all
I had similar some time ago, turned out to be a snapped Anti Role Bar Rose Joint (The Steve Heath variety were fitted but looked bery old and rusty) when jacked up the tension was such that the joints came back together so it wasn't obvious that one was broken.

Simon says

11,482 posts

108 months

[news] 
Sunday 5th August 2012 quote quote all
Ian confused i thought you said you checked the d/shafts which would include CV joints & gaiters etc surely frown

geoffvalenti

168 posts

127 months

[news] 
Sunday 5th August 2012 quote quote all
Propshaft UJ?

Barreti

Original Poster:

5,608 posts

124 months

[news] 
Sunday 5th August 2012 quote quote all
5.0ltr said:
Initial thought was rear spring snapping off part of the coil, did the noise continue after the `bang?`
Yes it did and it sounded like I was dragging half a dozen old metal tins behind me.

Update after the latest rolling around underneath session:
Both sides the CV gaiters are intact. The outsides are also dry with no evidence of anything leaking. All bolt heads are present and correct.

Back wheels are now off (yes, they were still tight Simon wink ) and I still can't see anything wrong.
Turning the wheels isn't producing any strange noises but its nice to see my LSD is still working biggrin
The springs and shocks look intact and OK, as do the wishbone bolts.

There is one odd thing, but it might be a red herring.
The front end of the prop has a shiny bit on it, but it looks to me like someone in the past has had hold of it with pipe grips because I can what I think are teeth marks.
There are no marks of any kind on top of the silencer, so I don't think anything has come off.

The prop UJ's feel OK, maybe a teeny tiny bit of movement on one angle of the rear joint. But thats just me being picky.

The diff brackets top and bottom look OK and all the bolts are still there.

There are no shiny witness marks anywhere underneath.

I've got the diff filler out ready for new oil but I don't know what else I can do until I road test it.

Oh, and I found the lump of grease which fell off and narrowly missed my head. It was on the headrest of my creeper - all nicely smeared around by my head rolleyes

Barreti

Original Poster:

5,608 posts

124 months

[news] 
Sunday 5th August 2012 quote quote all
Oh yes. I forgot.

The other check I did on the drive shafts was to pull/push in and out - and there is movement but no grinding or odd noises.
And I tried to push them up/down but they are nice and tight.

Currently the car is on stands so the wheels are hanging. In case it makes any difference.

Next step - diff oil and road test I think, but I'll happily check for anything anyone suggests.

You know when you start to wonder if you really did hear something ? confused

No, I certainly did. And you could hear it very obviously when I went under the bridge coming home.

taz turbo

535 posts

137 months

[news] 
Sunday 5th August 2012 quote quote all
Input shaft bearing of Diff broken up?

Seen it before on these Diffs. with similar symptoms to yours.

Chris.
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