If you do a stereo sound sample, you will be able to place the sound in 3D while playing it back with headphones on (a binaural recording). I think you will be able to tell the difference between tranny noise and cat-rattle noise (which it does not appear to be from previous posts).
Has anyone heard the sound in 1st or 5th?
Do people with cars that never crunch have the sound? (I would expect no). I'm guessing crunchers == rattlers. This would imply out of spec bearings and/or gears. As the transmission heats up, it gets closer to spec (I still hear the rattle when hot, only less so).
Do people with the aluminum or carbon-fiber driveshafts hear the rattle? Perhaps less?
Again, stereo (binaural) recording the tranny and engine will pinpoint the origin of the sounds in 3D.
*** After the following research, it sure sounds like it's the transmission: ***
See the "sounds like a bunch of marbles in a coffee can" comment regarding the C5 Corvette's Tremec 6-speed (2nd to last paragraph below).
Did a google search on "transmission rattle", found some interesting hits:
http://dodgeram.org/tech/troubleshoot/Problems.htm :
V10 Manual transmission rattle - TSB 21-13-97 - replace clutch disk and propshaft
http://dodgeram.org/tech/tsb/1998/21-04-98%20.htm
http://www.micro-tech-auto.com/bbs/Volvo/index.cgi?read=157
I had a rattle from what I thought was my tranny. It only happened a higher revs when the engine was cold. Unfortunatly, the rattle turned out to be a loose connecting rod. When it broke, it took out the block and the starter. Hope that's not your problem!
http://groups.google.com/groups?hl=en&threadm=357e3de5.17785916%40nntp.ix.netcom.com&rnum=7&prev=/groups%3Fq%3Dtransmission%2Brattle%26hl%3Den%26rnum%3D7%26selm%3D357e3de5.17785916%2540nntp.ix.netcom.com
http://groups.google.com/groups?q=transmission+rattle&start=10&hl=en&rnum=15&selm=hwj-ya02408000R2604971557370001%40news.mindspring.com
In article <
[email protected]>,
[email protected] (Hugh Johnson) wrote:
>I've got a '97 Mustang GT with a 5-speed, of which we recently took
>delivery. So far, the car is great, with only a few quibbles. One, which
>is particularly disappointing, is a resonant vibration which under certain
>circumstances causes something in the shifter assembly to rattle quite
>annoyingly.
Well, here's the follow-up to my rattling shifter experience.
I took the car to my dealership's service department and asked them to
check this rattle out, along with a few more initial-quality quibbles I had
with the car. It only had 930 miles on it at this point.
The service manager was quite anxious to please. He took my car in without
an appointment, and gave me a free loaner car. The Mustang was in the shop
for only two days. The result: I got a new transmission! The service
manager said that they could easily reproduce the rattle, and that it was
*not* normal, and that they weren't about to tear into a three week-, 900
mile-old transmission and start swapping out parts. They put in a brand
new one, and will send the old one back to Ford (who I guess will send it
back to Borg-Warner) to figure out what was the matter with it.
So far, I'm mightily impressed with my service department (Leif Johnson
Ford, Austin, Texas). My folks, who both have Fords ('90 Taurus SHO, '93
Probe GT) have not had as good luck with their dealerships -- so I was
expecting the worst. I was pleasantly surprised. Hopefully, they will
keep it up.
Anyway, the new transmission works fine, doesn't rattle or vibrate anymore,
and actually seems a little quieter. My original tranny seemed to whine a
lot on the lower gears, and the new one is quiet and efficient. Maybe the
original one was quite sick -- I'm glad I've got a new one.
On Mon, 8 Jun 1998 19:32:28 -0500,
[email protected] (C5 Dave) wrote:
>The transmission rattle and the shifter rattle are 2 different problems.
>The updated shifter assembly 1256-0342 won't fix the transmission
>rattle. I repeat they are 2 different problems. The transmission rattle
>is very common on the 6 speeds and is nothing to worry about. And the
>updated shifter assembly 1256-0342 has nothing to do with the bell
>housing. I see so much bad info in this news group it drives me crazy.
Drives me carzy sometimes too. Your right on about the transmission
rattle. The T56 rattles in just about all it's applications. I've
heard a bunch of F-body owners make comments about the 1st gear
rattle.
http://groups.google.com/groups?q=transmission+rattle&start=20&hl=en&rnum=27&selm=710csn%24hfe%241%40nnrp1.dejanews.com
Now it seems the same scenario is being repeated yet again with the C5. A
buddy of mine bought a 98 some time back. Looks *gorgeous*! Silver
metalic, black interior, 6-spd, couldn't be a sexier looking car if it
tried. But I can't even remember all the problems he's had with it so
far. Leaking windows. Rattles. Squeeks. To the dealer's credit they
fixed a number of them, but not all. There's some sort of transmission
rattle that he's had no luck getting fixed. "That's normal", they tell
him. It sounds like a bunch of marbles in a coffee can. Can you imagine
buying a $40,000+ M3 or Supra and having BMW or Toyota tell you "Sure, it
rattles like a child's toy, but that's normal"?? So why should it be
tolerated in a $40,000 car from GM? Then there's the oil leak, and the
sqeaky clutch pedal. Oh, and the paper-thin seats that wore through in a
matter of months. (To their credit, GM replaced this too with no hassle
whatsoever, but still.... will the next one be any better? Or the next?
What about when the car goes out of warrantee?)
Now, I'm not foolish enough to believe that one bad apple spoils the
bunch. But the problem is that these stories are *so* common that one
really wonders what's going on. It seems that among people with the
6-speeds, a very high percentage, like 80% or more, have the transmission
rattle. There are stories of orange-peel paint, hoods not closing
properly, seats wearing out after a few thousand miles, electronic
problems, whining fuel pumps, transmissions popping out of gear, power
seats not working, poor levels of fit and finish, and lots of other stuff.
If it was only a rare occurance, that would be one thing, but almost
everyone I've spoken to in person who owns a C5 has had problems with it.
To be fair, I've read some newsgroup posts from C5-owners who have been
problem-free, but this seems to be the exception rather than the rule.
<font size=-1>[ This Message was edited by: DrivingSimulators on 2001-12-30 05:22 ]</font>