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Join Date: Oct 2000
Location: agoura hills, ca 91301
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997.1 Crawls then stops

In need of help.

I parked the car at the mall and returned to it after 2 hours. Went inside, clutch in, gear in neutral, started the car, I heard a loud sound, the engine idled, geared in reverse, the car started to move slowly, then stops as if it is in neutral.

in lieu of reverse, i tried first gear with same results: crawls for a couple of feet then stops moving as if engine is in neutral.

No noise/grinding when shifting gears. I can start the engine without any noises or issues. The loud
bang never happened again.

Any ideas? It is a 2007 C4S.

One article mentioned it might be a “half shaft”. I just lifted the car and it looks like the CV joints are intact and no visible prior leakage. I can manually spin the rear wheels without difficulty and without noise. When I spin one wheel the other side spins in the other direction.

Could it be the clutch, pressure plate, Throw out bearing assembly? If it is the clutch assembly, I would be really be disappointed at the dealer for these units were replaced recently (mileage wise). It was 3+ years ago, but the car was never abused, raced, etc.

Thank you

Last edited by cab83_750; 09-03-2018 at 04:40 PM..
Old 09-01-2018, 10:15 AM
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I will check tranny fluid next even though so far no sign of tranny fluid leak.
Old 09-03-2018, 03:46 PM
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Drive shafts very likely. You need to crawl under the car and look at where the drive shafts connect to the gearbox. They may be loose and you cannot tell unless you look closely.
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Old 09-04-2018, 08:23 AM
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Quote:
Originally Posted by yelcab1 View Post
Drive shafts very likely. You need to crawl under the car and look at where the drive shafts connect to the gearbox. They may be loose and you cannot tell unless you look closely.
The bolts are all in and there are no signs of grease leakage. Would you mind clarifying loose? Is there a physical test I can perform in addition to the visual test.

What is super concerning is the LOUD sound that occurred before this issue came about. I mean I was at “park” and just cranked the engine.

Yesterday, I did hear a soft intermittent noise while engine is idling. The sound was similar to a tin can being dragged on concrete.

I am hoping you are correct about the driveshafts as this would be the least expensive problem compared to clutch or broken transmission problems.

Last edited by cab83_750; 09-04-2018 at 08:44 AM..
Old 09-04-2018, 08:35 AM
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If the bolts are all in, then that is not the problem. I am afraid you have to drop the engine-gearbox to find out what happened. The loud "bang" is concerning.
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Old 09-04-2018, 09:57 AM
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I may have to pull the tranny out. I am hoping that with the write up on Rennlist, plus my experience dropping the engine/tranny combo of my ‘83Sc, I would be successful.

Rusnak quoted about $6k for parts and labor (clutch job). 😮

An independent around $3K.

An independent (Porsche only), no quote as he wants to see the car. He did say that he has been getting a bunch of “defective clutch component” work lately. He even pointed one out which was recently done by a dealer.

Last edited by cab83_750; 09-04-2018 at 02:31 PM..
Old 09-04-2018, 01:49 PM
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$3K is a good deal for that clutch job. If you have done SC engine outs, then this is within possibility of your own skills. It is more of a G50 box than a 915 box, and there are more things to disconnect at the top, but the process is the same.

I can remove an SC engine in 2 hours, the 996 engine takes me more than a day to pull. You can / should do an SC engine out on jackstands, but the 996 can use a lift.
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Old 09-04-2018, 03:05 PM
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Thanks you for the push. I will be buying a tranny Jack for this tranny-only pull-out.

Sadly, i will be using jack stands similar to the others here:

https://rennlist.com/forums/997-forum/823814-replacing-the-clutch-in-a-997-1-here-s-how-i-did-it.html
Old 09-04-2018, 03:48 PM
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Last edited by yelcab1; 09-05-2018 at 06:17 AM..
Old 09-05-2018, 06:12 AM
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