[mr8417]

Hi all - here's my second post. Since I have never owned a 924/944/968 before , I don't really know what kind of noise levels are "normal" for the 968. It seems like a somewhat noisy car inside in general, but I would expect that considering the type of car. Also, in looking over the rear hatch area, I didn't see a whole lot of sound deadening, again not too surprising. So question #1 is - has anybody done anything to quiet it down a little - and if so, what. Question #2 is how much noise should I hear coming from the transaxle. I know about the dreaded "pinion bearing" problem. One of the reason's I chose this particular car is that it had the pinion done about a year ago. I have the receipts for about $3200 or so showing it was indeed done. So the question is, should there be any gearbox whine at all, or is some noise "normal" and if no - where should I start looking. I bought the car out of state - so I can't really run down to the shop that did the work and talk to them. Any and all ideas, theories greatly appreciated. (PS - don't mean to start my posting on a bad note, I LOVE driving this car, just a little concerned)
Thanks

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[flash]

the hardtop cars are unusually noisy inside - the glass hatch is a very good natural acoustic amplifier

dynamat extreme on all interior sheet metal surfaces really helps a LOT

what kind of noise are you hearing?

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[flwbyu]

Let me start by saying, that I own a coupe with the oem rear turbo rs spoiler. the porsche 968 cars are not quiet cars. I have done various other mods to the car that only add to the noise factor. You kind of learn to live with the noises, or not (constant battle).

From what I have seen, it is not an easy task to put dynamat throughout the whole car. This is mainly due to porsche gluing the carpet to the floor. I know some people have found creative ways of dealing with this issue but it's messy none the less. In your case the glue could work to your benefit since you are not removing it, just the carpet.

As far as the pinion bearing goes, only certain people are really qualified to do these jobs correctly. I know that when my pinion bearing was done, it was sent to chris cervelli who is out of state. He did a great job but it did have to go back several times. These cars are like swiss watches, very mechanical. If you have the receipt, I would contact the shop that did the original job. I am sure they would be more than willing to talk to you about it. It's good to error on this side of caution with these cars. Two keywords, preventative maintenance!

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[mr8417]

Thanks for the quick replies. Let me try to clarify a bit. First - should I be hearing ANY noise from the transaxle if it is working properly. I can hear a slight high pitched whine from the back of the car that varies in pitch and intensity depending on a) which gear I'm in b) how fast I'm going c) whether it's being drowned out by the constant tire noise (fairly wor Goodyear F1 D3's). It's not very loud - and I can't hear it at all most of the time - but I'm pretty sensitive to sound, being a musician who works for an audio equipment manufacturer.
Next - the shop that did the work is Rennsport Charleston S.C. I have two reciepts - the first is for the original trans r&r and lists the pinion bearing, end-shield bearing and input end-shield bearing in the parts list. The second invoice shows that they tore the trans apart again 4 mos. later under warranty ( guess it was still noisy). This lists a "carrier bearing" in the parts list and says - measure back-lash. Re-set pinion dimension "E" (69.99) Re-set diff spacing & pre-load. Re-set back lash(.17mm).
What I take away from these receipts is a) They seem to know what they are doing and b) they are a pretty good shop to tear the trans apart again 4 mos. later at no charge. Sorry for the long winded posts - tia for any and all thoughts.

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[flash]

a high pitched whine is indicative of pinion bearing, and it would not be the first time i have heard of a shop not getting it right - it's not common though

that being said, does it change on vs off throttle?

what fluid is in there? have you checked it?

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