V8v 4.3 clutch? Tell tale signs plaese help?

V8v 4.3 clutch? Tell tale signs plaese help?

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vantage83

Original Poster:

74 posts

169 months

Friday 1st October 2010
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After driving my 06 v8v 24k for 1m I have found that the car makes a lurching noise after the clutch has been engaged and the car is driving till the car gets up to higher speed.

This also happens at lower engine speeds while turning sometimes in 2/3rd gear.

Is this normal or should I be budgeting for a new clutch?

The car has just passed a 1yr Aston warranty and there was off clutch wear. The car also has no signs off clutch slip.

Please help

rick-derby-

1,105 posts

193 months

Friday 1st October 2010
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Hi can you describe the noise in more detail, is it with the clutch down depressed, or as you pull away or perhaps accelerating and can you describe it, such as a squeak or squeal, can you feel a differance when you hear the noise such as a vibration,

vantage83

Original Poster:

74 posts

169 months

Friday 1st October 2010
quotequote all
Rick

The noise is like a vibration only when the clutch has been let out until it gets up to a higher speed??

vantage83

Original Poster:

74 posts

169 months

Friday 1st October 2010
quotequote all
Rick

Originally I hought it was the brakes still could be not sure.

Also though with it being a high performance car it wouldnt be happy pootling around as you might expect.

rick-derby-

1,105 posts

193 months

Friday 1st October 2010
quotequote all
Dave they do have there own quirks, but from what you describe it seems strange, on low speed cornering you can get a vibration, the brakes can cause squealing and vibrations, where are you based as may be able to recommend someone who can road test and give you a comparison over what is expected,

Murph7355

38,697 posts

262 months

Saturday 2nd October 2010
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Out of interest, what speed are you doing when you notice it, and what speed does it disappear at.

And without wishing to come across as rude, are you *sure* you're in 2nd gear when it happens?

I think I know the noise you refer to, but it only ever happens on mind when I try and manoeuvre in too high a gear with the revs low. Or occasionally in 2nd or 3rd if I use the "anti stall" trick (just letting the clutch up with no accelerator - a function I'll miss if my next car doesn't have it smile).

Zod

35,295 posts

264 months

Saturday 2nd October 2010
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Murph7355 said:
Or occasionally in 2nd or 3rd if I use the "anti stall" trick (just letting the clutch up with no accelerator - a function I'll miss if my next car doesn't have it smile).
confused What's that then? The only anti-stall trick in my DB9 is more throttle.

eta - the no throttle thing works, but not uphill.

Edited by Zod on Saturday 2nd October 01:27

vantage83

Original Poster:

74 posts

169 months

Saturday 2nd October 2010
quotequote all
Rick

The car only does it in low speed not always cornering when the engine is in low revs ie when its labouring.

Im Based up in sunny Newcastle was thinking off either aston workshop or stratstone.

On my warranty check from Aston my car passed with flying colours no sign off clutch wear.

The car has also been serviced by Stratstone in July.

Rick I understand bout cars having thei own little quirks I'm in the motor trade I have sold cars for 7yr and a total petrol head to boot.

I just wanted some advice thats all dont want the lads in our workshop to look at it they wouldnt have a clue!!

How much would a new clutch be??

rick-derby-

1,105 posts

193 months

Saturday 2nd October 2010
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As the car has a carbon fibre prop you can get a chatter from this, also on slow cornering you can get noises and vibrations from the rear brakes,

Fullmel

146 posts

171 months

Saturday 2nd October 2010
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Could possibly be the p r v valve
Is it like a hooting type noise ?

rick-derby-

1,105 posts

193 months

Saturday 2nd October 2010
quotequote all
the price of the clutch varies considerably as labour rates vary,and the stated labour time is over 8 hours, independant price for the whole job including clutch, flywheel, spigot bearing and concentric slave cylinder, labour and vat would be around £2200.00 I would check with who you intend to use, but from what you describe i would not think it is the clutch,

moveover

345 posts

169 months

Saturday 2nd October 2010
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If the noise you are describing is a low grumbling when pulling away in low revs, I get this also. Just give it some more throttle and let the clutch out as soon as you can (within reason). Similarly, if you labour the engine in 2nd or 3rd, you get the noise. Basically, I've concluded that these cars don't like being babied when pulling away.

Murph7355

38,697 posts

262 months

Sunday 3rd October 2010
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moveover said:
If the noise you are describing is a low grumbling when pulling away in low revs, I get this also. Just give it some more throttle and let the clutch out as soon as you can (within reason). Similarly, if you labour the engine in 2nd or 3rd, you get the noise. Basically, I've concluded that these cars don't like being babied when pulling away.
I agree.

OP - it really depends what you mean by low speed, labouring etc. But it sounds very much to like a "they all do that sir". Have you tried the clutch test at speed (drop the clutch/bring back up/accelerate in a higher gear)?

Murph7355

38,697 posts

262 months

Sunday 3rd October 2010
quotequote all
Zod said:
confused What's that then? The only anti-stall trick in my DB9 is more throttle.

eta - the no throttle thing works, but not uphill.
I was meaning the lack of need for any throttle wink

Not tried it up a serious hill as don't recall ever being in traffic (when it's of most use) when on a decent incline...

bogie

16,566 posts

278 months

Sunday 3rd October 2010
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Murph7355 said:
Zod said:
confused What's that then? The only anti-stall trick in my DB9 is more throttle.

eta - the no throttle thing works, but not uphill.
I was meaning the lack of need for any throttle wink

Not tried it up a serious hill as don't recall ever being in traffic (when it's of most use) when on a decent incline...
I used this a lot in Norway on single track hilly routes when I kept meeting big vehicles coming the other way; dont use any throttle reversing uphill, just release the clutch slow n smooth and the car will do it for you (in my V8V anyway, never tried a DB9 in reverse)

I think theres some anti-stall throttle control in the software so it applys revs if it thinks its going to stall.....its almost like a bit of creep you get in an auto box....so reversing up hill you dont slip the clutch or give it lots of throttle at all...just let the car do it for you and cover the brake

in conjunction with the fly-off handbrake , and it also makes hill starts much easier ...usually when you see a car with 10K miles on the clock having a new clutch, its because someone hasnt got the hang of this, theyve been holding the car on the clutch on hills and giving it loads of revs/slip to get going wink


rick-derby-

1,105 posts

193 months

Sunday 3rd October 2010
quotequote all
bogie said:
...usually when you see a car with 10K miles on the clock having a new clutch, its because someone hasnt got the hang of this, theyve been holding the car on the clutch on hills and giving it loads of revs/slip to get going wink
I Completely agree with this, with one addition don't rest your foot on the clutch pedal when cruising,

moveover

345 posts

169 months

Sunday 3rd October 2010
quotequote all
bogie said:
Murph7355 said:
Zod said:
confused What's that then? The only anti-stall trick in my DB9 is more throttle.

eta - the no throttle thing works, but not uphill.
I was meaning the lack of need for any throttle wink

Not tried it up a serious hill as don't recall ever being in traffic (when it's of most use) when on a decent incline...
I used this a lot in Norway on single track hilly routes when I kept meeting big vehicles coming the other way; dont use any throttle reversing uphill, just release the clutch slow n smooth and the car will do it for you (in my V8V anyway, never tried a DB9 in reverse)

I think theres some anti-stall throttle control in the software so it applys revs if it thinks its going to stall.....its almost like a bit of creep you get in an auto box....so reversing up hill you dont slip the clutch or give it lots of throttle at all...just let the car do it for you and cover the brake

in conjunction with the fly-off handbrake , and it also makes hill starts much easier ...usually when you see a car with 10K miles on the clock having a new clutch, its because someone hasnt got the hang of this, theyve been holding the car on the clutch on hills and giving it loads of revs/slip to get going wink
This is a revelation. I've been struggling for ages in reverse with the car stalling when I'm trying to balance the throttle and clutch. And all the time, there was no need for any throttle control. This isn't even in the manual! I took my car up to Newport Pagnell and not even they told me about the anti-stall mechanism.

You learn something every day !

roughrider

978 posts

192 months

Sunday 3rd October 2010
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This noise is simply the 4 springs in the centre of the clutch plate vibrating as the engine revs fall too low under load. 99% of RWD road cars have a rubber "donut" in the propshaft to eliminate any transmission vibration/noise into the cabin. The Astons are a sports car, and don't have the "donut".

Murph7355

38,697 posts

262 months

Sunday 3rd October 2010
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I suspect it's also more pronounced due to the transaxle design....