| Author |
Message |
Kyle and Lori Greene
Guest
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 Posted:
Sun Dec 05, 2004 8:48 pm Post subject:
Auto tranny noise |
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My 98 740iL recently developed a rattling noise when the car is put in
either drive or reverse. When in park or neutral, it is quiet. I'm
familiar with manual transmissions. Usually on those it would be the throw
out bearing in the clutch assembly that would cause this type of rattle. Is
there something in the torque converter similar to this? Could it be
something else entirely? I'm not as familiar with automatics so any help
would be appreciated.
TIA
Kyle.
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John Burns
Guest
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| Posted:
Mon Dec 06, 2004 3:10 pm Post subject:
Re: Auto tranny noise |
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| Quote: | My 98 740iL recently developed a rattling noise when the car is put in
either drive or reverse. When in park or neutral, it is quiet. I'm
familiar with manual transmissions. Usually on those it would be the throw
out bearing in the clutch assembly that would cause this type of rattle. Is
there something in the torque converter similar to this? Could it be
something else entirely? I'm not as familiar with automatics so any help
would be appreciated.
|
Sure it's not due to an exhaust bracket near the tranny?
--
Who needs a life when you've got Unix? :-)
Email: john@unixnerd.demon.co.uk, John G.Burns B.Eng, Bonny Scotland
Web : http://www.unixnerd.demon.co.uk - The Ultimate BMW Homepage!
Need Sun or HP Unix kit? http://www.unixnerd.demon.co.uk/unix.html |
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Kyle and Lori Greene
Guest
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| Posted:
Tue Dec 07, 2004 2:56 am Post subject:
Re: Auto tranny noise |
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"John Burns" <john@unixnerd.demon.co.uk> wrote in message
news:41B43013.296D@unixnerd.demon.co.uk...
| Quote: | My 98 740iL recently developed a rattling noise when the car is put in
either drive or reverse. When in park or neutral, it is quiet. I'm
familiar with manual transmissions. Usually on those it would be the
throw
out bearing in the clutch assembly that would cause this type of rattle.
Is
there something in the torque converter similar to this? Could it be
something else entirely? I'm not as familiar with automatics so any help
would be appreciated.
Sure it's not due to an exhaust bracket near the tranny?
|
I'm pretty sure it's not a bracket. If the car is not moving and the shift
selector is moved from Park to Reverse (without moving the car) the rattle
starts. As the shifter is moved to Neutral, the rattle stops. It then
starts up again when its moved into Drive. For it to be an exhaust bracket
rattle, I would think the car would need to be either moving or if it was
being caused by engine vibration it would rattle as long as the engine is
running.
Kyle.
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Jeff Strickland
Guest
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| Posted:
Tue Dec 07, 2004 3:42 am Post subject:
Re: Auto tranny noise |
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"Kyle and Lori Greene" <kylogreene1@tampabay1.rr1.com> wrote in message
news:IA4td.95928$8G4.54533@tornado.tampabay.rr.com...
| Quote: |
"John Burns" <john@unixnerd.demon.co.uk> wrote in message
news:41B43013.296D@unixnerd.demon.co.uk...
My 98 740iL recently developed a rattling noise when the car is put in
either drive or reverse. When in park or neutral, it is quiet. I'm
familiar with manual transmissions. Usually on those it would be the
throw
out bearing in the clutch assembly that would cause this type of
rattle.
Is
there something in the torque converter similar to this? Could it be
something else entirely? I'm not as familiar with automatics so any
help
would be appreciated.
Sure it's not due to an exhaust bracket near the tranny?
I'm pretty sure it's not a bracket. If the car is not moving and the
shift
selector is moved from Park to Reverse (without moving the car) the rattle
starts. As the shifter is moved to Neutral, the rattle stops. It then
starts up again when its moved into Drive. For it to be an exhaust
bracket
rattle, I would think the car would need to be either moving or if it was
being caused by engine vibration it would rattle as long as the engine is
running.
Kyle.
|
It could easily be an exhaust system bracket making this noise. It is a
harmonic frequency thing that occurs under a certain set of conditions,
standing at idle in R or D is among the conditions. |
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