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Registered
Join Date: Mar 2002
Location: Calgary, Alberta
Posts: 224
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Transmission noise
My 915 transmission drives ok and shifts without grinding if you let the RPM drop some between shifts. My main concern is it has a strange rattling noise like shims that spin freely around a shaft. It makes the noise in all gears with no change in the sound, it is not a continous noise but happens quite a bit. Any thoughts on what this rattling noise might be.
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75 targa 2.7 Lean and green |
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09-28-2003, 07:17 AM
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The Unsettler
Join Date: Dec 2002
Location: Lantanna TX
Posts: 23,885
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Let the car idle in neutral, clutch out, make noise? Push clutch in, does noise go away?
If yes then most likely throw out bearing. Scott
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"I want my two dollars" "Goodbye and thanks for the fish" "Proud Member and Supporter of the YWL" "Brandon Won" |
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09-28-2003, 08:38 AM
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Registered
Join Date: Dec 1999
Location: TX USA
Posts: 9,804
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Paul,
If the rattling is ocurring at low rpm ... say 1000 - 2000 rpm, then it isn't anything to worry about! Just such noise has been the reason for much R&D at Porsche in the past 25 years ... and some ideas that perhaps shouldn't have been incorporated into production models, such as the infamous SC 'exploding' rubber-centered clutch disk, have resulted from that R&D! Some noise is perfectly normal from a transaxle, and only when Porsche started catering to the luxury, upscale lawyer/doctor clientele ... did NVH concerns start to impact and override performance goals in the '70's and '80's.
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' |
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09-28-2003, 12:28 PM
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Registered
Join Date: Mar 2002
Location: Calgary, Alberta
Posts: 224
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stomachmonkey, it is definitely not a throwout bearing, at first I thought that it might be.
Early_S_Man, I had a 73 that did not make any noise like this so I am sure something in the transmission needs attention. I had a new clutch put in recently so I do not think the clutch is the problem. Also the noise was there before I had the clutch done. Thanks for the replys.
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75 targa 2.7 Lean and green |
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09-28-2003, 03:40 PM
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The Unsettler
Join Date: Dec 2002
Location: Lantanna TX
Posts: 23,885
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Hey Paul,
So I'm driving in this morning and I hear this intermittent high pitched jingling. Immediately thought about your post and started to get that nervous feeling in my wallet. Had a real hard time figuring out where it was coming from, sounded like the tunnel where all the linkage runs. Turned out to be a zipper pull on my briefcase. Have you looked for loose items in the car? Have you done a "nut and bolt". Something I have always done on my older cars is to take a day and go around looking for loose fittings. You'd be surprised how much stuff can come undone over the years. Scott
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"I want my two dollars" "Goodbye and thanks for the fish" "Proud Member and Supporter of the YWL" "Brandon Won" |
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09-29-2003, 05:37 AM
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Registered
Join Date: Mar 2002
Location: Calgary, Alberta
Posts: 224
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This is not a subtle noise it is loud enough you would hear it if I drove by you standing on the street.
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75 targa 2.7 Lean and green |
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09-29-2003, 06:20 AM
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HI Paul,
Have you ver found out what was the source of this noise? I have a very similar situation on my car. Thanks
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Mario '76 911 w/'97 3.6 Euro Vario Engine & Turbo body kit & TPC Supercharger '15 GT3 |
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11-27-2006, 08:05 AM
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