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lightning
 Post subject: Rattle from torque converter?
PostPosted: Wed Feb 24, 2010 11:13 pm 
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Went out in the 928 S4 tonight, thought I'd try the kickdown from about 5 mph and all was fine....got home and the car sounds like a bag of spanners when sat at tickover.
Noise sounds like it's coming from the rear underneath but cannot be sure, lifting the bonnet you can't hear it. Loudest when stood behind the car. Sounds like clatter/rattle and is rhythmic. cla cla cla cla cla cla cla. Any ideas? Torque tube? Torque converter? Still drives perfectly.


Last edited by lightning on Fri Feb 26, 2010 9:24 am, edited 1 time in total.

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Brett928S2
 Post subject: Re: All I did was floor it!
PostPosted: Wed Feb 24, 2010 11:19 pm 
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lightning wrote:
Went out in the 928 S4 tonight, thought I'd try the kickdown from about 5 mph and all was fine....got home and the car sounds like a bag of spanners when sat at tickover.
Noise sounds like it's coming from the rear underneath but cannot be sure, lifting the bonnet you can't hear it. Loudest when stood behind the car. Sounds like clatter/rattle and is rhythmic. cla cla cla cla cla cla cla. Any ideas? Torque tube? Torque converter? Still drives perfectly.


Hi :)

Loose exhaust ???

All the best Brett :)

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 -UK 928 1/4 Mile and Top Speed Record Holder-208.10 mph- Email managingdirector@pchealthcare.co.uk

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lightning
 Post subject: Re: All I did was floor it!
PostPosted: Thu Feb 25, 2010 8:54 am 
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I've had a look underneath the car this morning and the clattering seems to be coming from the torque converter. I guess I need a new one. Is there an oil resevoir on it?
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Brett928S2
 Post subject: Re: All I did was floor it!
PostPosted: Thu Feb 25, 2010 1:30 pm 
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lightning wrote:
I've had a look underneath the car this morning and the clattering seems to be coming from the torque converter. I guess I need a new one. Is there an oil resevoir on it?



Hi :)

Torque converter is filled from the autobox (part of same system) so check auotbox fluid level....while engine running etc....

All the best Brett :)

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 -UK 928 1/4 Mile and Top Speed Record Holder-208.10 mph- Email managingdirector@pchealthcare.co.uk

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lightning
 Post subject: Re: All I did was floor it!
PostPosted: Thu Feb 25, 2010 4:13 pm 
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ATF level is fine. I'll check the flexplate and bolts on the torque tube, if that's all OK it's time to get the cheque book out again!
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lightning
 Post subject: Re: All I did was floor it!
PostPosted: Thu Feb 25, 2010 10:17 pm 
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What could cause a rattle in the area of the torque converter? I'm not too sure what is behind that cover at the front of the auto transmission. I'm guessing the torque tube connects to it. Could the noise be coming from the other end of that, say the flex plate?
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tr7v8
 Post subject: Re: All I did was floor it!
PostPosted: Fri Feb 26, 2010 9:41 am 
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lightning wrote:
What could cause a rattle in the area of the torque converter? I'm not too sure what is behind that cover at the front of the auto transmission. I'm guessing the torque tube connects to it. Could the noise be coming from the other end of that, say the flex plate?

It could be a cracked flex plate that would rattle but if it varies with the engine speed when in neutral it could be a vane or vanes in the TC that have broken loose. Giving it some beans would up the load & could quite easily fracture a weld if it is already iffy. Find a local auto specialists & let him have a listen.

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lightning
 Post subject: Re: Rattle from torque converter?
PostPosted: Tue Mar 02, 2010 1:59 pm 
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It's gone in to the local specialist. They've said they will have to remove the transmission to find out what is wrong....but it might be some bearing or other on the input shaft.
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watchcam
 Post subject: Re: Rattle from torque converter?
PostPosted: Tue Mar 02, 2010 3:10 pm 
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Hope its not too painful for you!

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2003 4.7 H.O Grand Cherokee

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1986 944 Lux
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lightning
 Post subject: Re: Rattle from torque converter?
PostPosted: Tue Mar 02, 2010 4:38 pm 
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They've said it is 8-10 hours labour just to remove the transmission.
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sidbounce
 Post subject: Re: Rattle from torque converter?
PostPosted: Tue Mar 02, 2010 8:06 pm 
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Sorry to hear that lightning..hope you manage to get it sorted soon. I had a look at the pics of your 928.. looks lovely. All the best. Rob T.

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Brett928S2
 Post subject: Re: Rattle from torque converter?
PostPosted: Tue Mar 02, 2010 10:08 pm 
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lightning wrote:
They've said it is 8-10 hours labour just to remove the transmission.


Hi :)

No it isnt.... I could pull the box in around 3 hours...Paul A could probably pull it in 1 hour lol :)

8 - 10 hours to pull ,find problem, rebuild and put back in...maybe,,,,,but if its 8 - 10 hours to pull it....go somewhere that knows 928s....

All the best Brett :)

_________________
928S2 AUTO V8 4.7 1986-XPIPES ANDERSON RACE EXHAUST,K&N, WIZARDS OF NOS MAXX RACE CONTROLLER & WON RACE REVO NITROUS KIT 2000 HP CAPABLE.
 -UK 928 1/4 Mile and Top Speed Record Holder-208.10 mph- Email managingdirector@pchealthcare.co.uk

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lightning
 Post subject: Re: Rattle from torque converter?
PostPosted: Wed Mar 03, 2010 9:29 am 
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I think they must mean that? Eight hours to do the whole job. They are a well known Porsche specialist. I'm not sure I want to sell the car after all, despite this latest problem. It's still hardly any money to pay for a genuine supercar.
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Brett928S2
 Post subject: Re: Rattle from torque converter?
PostPosted: Wed Mar 03, 2010 10:26 am 
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lightning wrote:
I think they must mean that? Eight hours to do the whole job. They are a well known Porsche specialist. I'm not sure I want to sell the car after all, despite this latest problem. It's still hardly any money to pay for a genuine supercar.


Hi :)

Check if they DO mean that....lol

All the best Brett :)

_________________
928S2 AUTO V8 4.7 1986-XPIPES ANDERSON RACE EXHAUST,K&N, WIZARDS OF NOS MAXX RACE CONTROLLER & WON RACE REVO NITROUS KIT 2000 HP CAPABLE.
 -UK 928 1/4 Mile and Top Speed Record Holder-208.10 mph- Email managingdirector@pchealthcare.co.uk

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watchcam
 Post subject: Re: Rattle from torque converter?
PostPosted: Wed Mar 03, 2010 3:59 pm 
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Keep us up to speed with how it goes!

Been without mine for 2 weeks now :-(

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1985 928 S2 Iris Blue
2006 A6 3.0 Quattro
2003 4.7 H.O Grand Cherokee

Gone but not forgotten:
1986 944 Lux
1988 944 Lux

Location - Near Bath in South West

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