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FlipFlopGriff

5,650 posts

133 months

[news] 
Thursday 9th August 2012 quote quote all
Diff bush?

Also could it be the exhaust tapping something, ie the rubber bits under the central plate given up the ghost? Or the exhaust retaining bolt into the engine near the flexi bit of the exhaust come out?
FFG

Barreti

Original Poster:

5,597 posts

123 months

[news] 
Thursday 9th August 2012 quote quote all
I've ordered a UJ and will do that first, and check that big nut while I'm at it.
Then if its not sorted out I'll pull the drive shafts off and have a look at the CVs

If that still doesn't fix it I'll pull the diff to see what we find and change the bushes at the same time.

Thanks for your suggestions FFG, but everything on the exhaust side looks fine.

TBH, I would have thought with the noise its putting out that its not the UJ, because it would be in bits. But its the cheapest and easiest bit to sort out so I'll give it a go.

PoleDriver

21,531 posts

80 months

[news] 
Thursday 9th August 2012 quote quote all
Actually, now I think about it, I had very similar symptoms in my Cerb when the diff mounting bushes went which allowed it to move. On power it would knock but was fine on over-run.

FlipFlopGriff

5,650 posts

133 months

[news] 
Thursday 9th August 2012 quote quote all
FlipFlopGriff said:
Diff bush?
FFG
Already suggested that.
FFG

Barreti

Original Poster:

5,597 posts

123 months

[news] 
Sunday 26th August 2012 quote quote all
I pulled the OS drive shaft off yesterday ( with a little telephone support from a great guy some of you might remember called Seasider wavey )
I didn't think there was anything wrong with the CV joints on this side so I pulled the other drive shaft off as a point of reference.

The NS CV bearings are quite dry and very shiny - unlike the OS which were covered in grease.

Proper melted chocolate consistency grease.
Am I the only one on here who loves the feel of thick grease paperbag
Sorry, I digress.

The NS CV joints are both a little 'clicky' when I shake them but not really as loose and obviously knackered as I thought I would find.

So I'm taking both to a BBQ this afternoon where 4 guys who know about cars can all offer their opinion.
I wonder how many of them will have their hands covered in grease before 5 mins is out hehe
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tom's dad

268 posts

125 months

[news] 
Sunday 26th August 2012 quote quote all
Similar symptoms to mine when one of the diff bracket to chassis bolts sheared, another having sheared at some other time without me knowing. In my case it resulted in a full diff bearing replacement.

Graham.

Barreti

Original Poster:

5,597 posts

123 months

[news] 
Saturday 8th September 2012 quote quote all
Well this ruddy saga continues.

I've got enough to go on for now, so please don't tell me any more things that it could be or I'll go mad.

But suffice to say, I had to literally hammer both CVs off of the NS drive shaft - thats all put back together now with new CV joints/boots etc.

Last night I started dismantling the OS drive shaft CVs to re-grease them because they felt OK, until I took the boot off one and the bugger jams as it rotates.
This morning I've been trying to get that off the shaft and it won't come off either. I've tried a puller, heat, 4lb hammer and it won't shift.
I even hit my thumb with said 4lb hammer - presumably its a trick I've read and its stuck in my subconscious memory because I can't think why else I'd do something so bloody nutsweeping

It will come off, I guarantee that.
I'm not effing about with this any longer while the sun is melting the ruddy tarmac and my 'Summer' car is in bits in the garage.

This morning I ordered 2 more CVs and I'm off back to the garage now for a bit of anger management therapy with a hammer

[/rant]

rev-erend

18,251 posts

170 months

[news] 
Sunday 9th September 2012 quote quote all
Sometimes giving the job to the experts is a good idea biggrin

Barreti

Original Poster:

5,597 posts

123 months

[news] 
Sunday 9th September 2012 quote quote all
You know Rev, you're probably right biggrin

Today I went out in the Landy and took a mate to the Land Rover Owner show in Peterborough. We had a great day out in the sunshine, eat pies & sausages and spent money on my favourite toy - the Landy.
On days like today I wonder if I'm cut out for TVR ownership.


Guillotine

5,343 posts

150 months

[news] 
Sunday 9th September 2012 quote quote all
Sounds like the diff to me mate, as Brummie.


rev-erend

18,251 posts

170 months

[news] 
Monday 10th September 2012 quote quote all
I do a lot of stuff myself but some of the crap jobs - I let the local specialists do .. they love me for it biggrin

Barreti

Original Poster:

5,597 posts

123 months

[news] 
Friday 21st September 2012 quote quote all
And so the saga continues....

I've replaced all 4 CV joints and on the test run last night I still had a duff, duff, duff, duff noise which increases with speed, but which I discovered I can make go away by either depressing the clutch or feathering the throttle to reduce load.

Tonight I've pulled off the prop and both UJs are ok.
I would replace one, except the new one i bought from David Gerald is the wrong size !!

I forgot about that big nut, so I'll check that first thing in the morning.

Then I'll check the wheel bearings.

Is there any way at all I can check the diff?
The brackets look ok.

The only bit of good news in this so far is the CVs balls were knackered. The guys at work (I work for a bearing co.) inspected them under the electro microscope and told me the car had at some time had water in them and been stood for a while, corroding the balls. So they weren't much longer for this world.


grahamw48

9,918 posts

124 months

[news] 
Saturday 22nd September 2012 quote quote all
I will put in a vote for pinion bearing.

Barreti

Original Poster:

5,597 posts

123 months

[news] 
Sunday 23rd September 2012 quote quote all
You might be right Graham.
I've ruled out CVs, prop UJ's and splines, wheel bearings, loose big nut and damaged diff brackets.
So yesterday we dropped the new oil out of the diff, which has done about 4 miles, and found shards of metal attached to the magnetic plug.
They are very shiny, so my guess is they are ball bits.

Time to drop the diff.
Is there an upgrade to the GKN unit or do i just have it rebuilt?


In a masochistic kind of way I think I'm enjoying this journey wink

Conian

7,949 posts

87 months

[news] 
Sunday 23rd September 2012 quote quote all
Could you have just run over something, which clattered under your car for a short while then freed itself and lay on the road?

Barreti

Original Poster:

5,597 posts

123 months

[news] 
Sunday 23rd September 2012 quote quote all
Thanks for the suggestion Conian but after test driving the car on Thurs after changing the CV joints the noise was not only still there but getting worse.

Simon says

11,451 posts

107 months

[news] 
Sunday 23rd September 2012 quote quote all
Barreti said:
You might be right Graham.
I've ruled out CVs, prop UJ's and splines, wheel bearings, loose big nut and damaged diff brackets.
So yesterday we dropped the new oil out of the diff, which has done about 4 miles, and found shards of metal attached to the magnetic plug.
They are very shiny, so my guess is they are ball bits.

Time to drop the diff.
Is there an upgrade to the GKN unit or do i just have it rebuilt?


In a masochistic kind of way I think I'm enjoying this journey wink
Thats probably your problem as the magnet drain plug is not the lowest part of the diff (oil res wise) so god only knows how much shrapnel are near the input/front pinion bearing area, the pinion front and rear bearings are the hardest working bearings in the diff and its usually the front pinion bearing that fails 1st frown although if it as collapsed bad enough that can be detected with up & down movement of the input flange and oil loss from the same area along with a graveley/growling/marbles sound scratchchin keeps us updated Ian wink

500dread

195 posts

29 months

[news] 
Sunday 23rd September 2012 quote quote all
It's the diff.

FFS it's the diff.

It's been the diff for six or more weeks.

FFS change the diff! Please.

You're killing me. Just change the fking diff!

5.0ltr

2,085 posts

85 months

[news] 
Sunday 23rd September 2012 quote quote all
500dread said:
It's the diff.

FFS it's the diff.

It's been the diff for six or more weeks.

FFS change the diff! Please.

You're killing me. Just change the fking diff!
I think it is the diff Ian, dunno why? (But actually I think it is the diff and has been from day 1)

taz turbo

535 posts

136 months

[news] 
Sunday 23rd September 2012 quote quote all
^ +1

taz turbo on 5th August!!!!!!!!! said:
Input shaft bearing of Diff broken up?

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

Chris.
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