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'Normality' levels of G50 chatter?

T

tail_heavy

New member
The G50 box on my 60,000 mile 87 3.2 chatters / rattles audibly in neutral when hot (clutch released, it's silent with clutch depressed, i.e. it must be the box). There's also a certain amount of driveline chatter when pulling away at low revs (< 1500) in 1st and 2nd. As this is my first G50 boxed car, I was wondering if this is normal. I can drive around it and am happy to live with it, as long as it's not a sign of impending failure! I was just wondering whether other G50 3.2s suffered from it.
 
Hi, I'm new to 911's but normally chatter that disappears when you press the clutch down is due to a noisy clutch release bearing and is not a problem.
 
Mine chatters when pulling away at low revs in 1st and 2nd aswell. However, not sure whether its a problem with it. I think it's always done it in the 4 years I have had mine. Does anyone know what the noise is?
 
Warwick

It's probably the shift rod rattling. Irritating but no real issue. Porsche did issue a service bulletin for it but the 'fix' is neither very effective or sophisticated. Basically involves tensioning a large o-ring against the rod. I have a scan of the bulletin somewhere - can post if you are interested.
 
I've had 2 G50 cars, the first was in 1990 and almost new. They should chatter when pulling off in low revs.
Enjoy!
 
Here goes....



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Guys,

Thanks for the responses so far. At least I know there are three other cars out there that do it! (2 x 911addict + 1 x wormand).

I'm pretty sure this is chatter in the sense of axial vibration in the drive train. Like a lot of Getrag boxes, the G50 has a bit of a truck like character (even the boxes on my old air cooled BMW boxers are a bit like this), and, having experienced chatter in truck transmissions, I'm not too worried. But, it's reassuring to know that it seems like a regular characteristic.

Interesting point about the shift rattle, Chris_911. I must seek out a collection of 3.2 related Tech Bulletins.
 
Mine does too. I went so far as to ask a technician to have a look at it and he also said this is completely normal. I'd not heard of the rubber ring fix. Seems like a fairly low cost easy potential improvement. I think I'll have a go to see if it improves things.
 
The part number is still current on the bulletin. Bought another one recently (thinking of trying two at once to see if I can improve things) - cost £2.58 from my friendly OPC.
 
Mine does it.

It's called the "coffee grinder" sound, and I believe it's normal with the G50. Incidentally, I had heard that there is another mod from Porsche

I first saw it when I went to purchase a LHD Club Sport and was at the OPC for the inspection. I mentioned the sound from the 'box and the techie said :- "they all do that" but indicated that there should be an anti-resonance strap between one part of the engine and the gearbox.

In fact, on the car in question, the rod was there, but broken in the middle. It was about 4" long and had a flattened profile to it.

My car doesn't have this.

Anyhow, I think it's not a rattle, but "character" [;)]

 
My 930 chatters which has a G50/01. I thought it was the clutch that chatters unless you are using a rubber diaphragm centred clutch plate. I guess that mine is a spring centred type.
 


( Quote )

I first saw it when I went to purchase a LHD Club Sport and was at the OPC for the inspection. I mentioned the sound from the 'box and the techie said :- "they all do that" but indicated that there should be an anti-resonance strap between one part of the engine and the gearbox.

In fact, on the car in question, the rod was there, but broken in the middle. It was about 4" long and had a flattened profile to it.

[/quote]

Hi

Does anyone have anymore info on the above and where it is situated.

Thank you

Ian
 
Greetings
Forget the chatter, fit a Hayward & Scott stainless exhaust system and open the window...........problem solved[:D] deep joy.
Needless to say my carriage does not exhibit any rattles, at least not that I can detect[:)]
(Silly boy.ed)
Good luck
Alex
 
I've got a 87 911 3.2 SSE it doesnt "chatter" if its normal I am really worried,does it mean my car isn't normal,or perhaps I don't know what chatter sounds like,should I phone a chat line,can anyone recommend a good one,what a worry[:D]
 
I too have a 1987 911 3.2 SSE, it does not chatter as far as I can tell. Had it on the Dyno at Ninemeister in Warrington last week. Would this chatter appear during the Dyno run?????

No comment was made by Colin at Ninemeister so it cannot be that obvious on my 911.

So maybe it is not that normal afterall

Regards
Addam
 
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