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Mysterious jerking at idle

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clifffreeling@yahoo.com
 
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Default Mysterious jerking at idle - 12-14-2005 , 06:34 PM






'98 E36, well maintained and in very good condition.
This has only happened a couple of times, but I'll
be sitting in traffic, then comes what feels like a sudden
jerk of some sort. That's it. Everything else normal.
I don't know if it could be a transmission problem or
engine/electrical prob. of some sort, because the trans
was in Drive at the time. I've had the car five years,
never had this happen before...just changed the oil
and filter last week but can't imagine this being a factor.
Any ideas?

--
Cliff


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Josh Assing
 
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Default Re: Mysterious jerking at idle - 12-14-2005 , 07:46 PM






if you shift it into neutral does it stop jerking?
if you increase engine RPM does it stop jerking?

On 14 Dec 2005 15:34:18 -0800, clifffreeling (AT) yahoo (DOT) com wrote:

Quote:
'98 E36, well maintained and in very good condition.
This has only happened a couple of times, but I'll
be sitting in traffic, then comes what feels like a sudden
jerk of some sort. That's it. Everything else normal.
I don't know if it could be a transmission problem or
engine/electrical prob. of some sort, because the trans
was in Drive at the time. I've had the car five years,
never had this happen before...just changed the oil
and filter last week but can't imagine this being a factor.
Any ideas?

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Jeff Strickland
 
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Default Re: Mysterious jerking at idle - 12-14-2005 , 08:35 PM



You didn't say, but my guess is you have an automatic. I suspect you need
transmission service if I'm correct.




<clifffreeling (AT) yahoo (DOT) com> wrote

Quote:
'98 E36, well maintained and in very good condition.
This has only happened a couple of times, but I'll
be sitting in traffic, then comes what feels like a sudden
jerk of some sort. That's it. Everything else normal.
I don't know if it could be a transmission problem or
engine/electrical prob. of some sort, because the trans
was in Drive at the time. I've had the car five years,
never had this happen before...just changed the oil
and filter last week but can't imagine this being a factor.
Any ideas?

--
Cliff



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clifffreeling@yahoo.com
 
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Default Re: Mysterious jerking at idle - 12-16-2005 , 09:24 AM




Jeff Strickland wrote:
Quote:
You didn't say, but my guess is you have an automatic. I suspect you need
transmission service if I'm correct.
Yep, as I said, it's done it when the car was in Drive. It's only done
it a couple of times, but it's annoying. Hmmm, transmission service.
I've always been fortunate in that I've NEVER had any transmission
problem in 30+ years of owning cars, and I keep them a long time.
My regular owners manual says the fluid is for life and doesn't need
changing, and even checking it is a pain. Of course, my Bentley's
manual recommends changing it, but they seem to over-recommend
things sometimes. I guess it gives them something to fill pages with.

--
Cliff



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Josh Assing
 
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Default Re: Mysterious jerking at idle - 12-16-2005 , 09:44 AM



Quote:
My regular owners manual says the fluid is for life and doesn't need
changing, and even checking it is a pain. Of course, my Bentley's
I recently had a "hard shifting" in my transmittion. Almost like it had a
"sport transmittion shift kit" installed. I flushed the tranny (power flush;
not a fluid change) and the car shifts smoothly and comfortably.

While there -- (I went to two different shops to talk to them about it as I got
some conflicting information over the internet) -- Both places told me "It's
more expensive if you have the lifetime fluid - but it's not lifetime fluid and
should be changed regardless -- there is no "filter" in those transmittions."

If I were you, Id go fo the power flush -- I think it's about $250 US to do a
power flush with the synthetic.

Cheers
-josh


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clifffreeling@yahoo.com
 
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Default Re: Mysterious jerking at idle - 12-16-2005 , 09:58 AM




Josh Assing wrote:
Quote:
My regular owners manual says the fluid is for life and doesn't need
changing, and even checking it is a pain. Of course, my Bentley's

I recently had a "hard shifting" in my transmittion. Almost like it had a
"sport transmittion shift kit" installed. I flushed the tranny (power flush;
not a fluid change) and the car shifts smoothly and comfortably.

While there -- (I went to two different shops to talk to them about it as I got
some conflicting information over the internet) -- Both places told me "It's
more expensive if you have the lifetime fluid - but it's not lifetime fluid and
should be changed regardless
But keep in mind that the people telling you this make money from
changing
the fluid. But as you say, different "experts" will tell you different
things.
I myself have never changed tranny fluid in any car I've owned, and
I'm inclined to put more stock in what the owner's manual says....
that said, it wouldn't surprise me though if I will need some tranny
work done in the future with this car.

Quote:
-- there is no "filter" in those transmittions."
Ah but there is. It's sometimes called a "strainer" though.

--
Cliff



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  #7  
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Jeff Strickland
 
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Default Re: Mysterious jerking at idle - 12-16-2005 , 09:19 PM



The transmission probably only needs to have a fresh shot of fluid. It
doesn't sound broken at all. I suspect the fluid is suposed to be a life
item, but when the transmissin jerks, I'd be looking to the fluid first. It
is not unreasonable for the car to shudder once in a while, especially when
cold, and the shudder might have nothing at all to do with the transmission.




<clifffreeling (AT) yahoo (DOT) com> wrote

Quote:
Jeff Strickland wrote:
You didn't say, but my guess is you have an automatic. I suspect you need
transmission service if I'm correct.

Yep, as I said, it's done it when the car was in Drive. It's only done
it a couple of times, but it's annoying. Hmmm, transmission service.
I've always been fortunate in that I've NEVER had any transmission
problem in 30+ years of owning cars, and I keep them a long time.
My regular owners manual says the fluid is for life and doesn't need
changing, and even checking it is a pain. Of course, my Bentley's
manual recommends changing it, but they seem to over-recommend
things sometimes. I guess it gives them something to fill pages with.

--
Cliff



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  #8  
Old   
Jeff Strickland
 
Posts: n/a

Default Re: Mysterious jerking at idle - 12-16-2005 , 10:08 PM




<clifffreeling (AT) yahoo (DOT) com> wrote

Quote:
Josh Assing wrote:
My regular owners manual says the fluid is for life and doesn't need
changing, and even checking it is a pain. Of course, my Bentley's

I recently had a "hard shifting" in my transmittion. Almost like it had
a
"sport transmittion shift kit" installed. I flushed the tranny (power
flush;
not a fluid change) and the car shifts smoothly and comfortably.

While there -- (I went to two different shops to talk to them about it as
I got
some conflicting information over the internet) -- Both places told me
"It's
more expensive if you have the lifetime fluid - but it's not lifetime
fluid and
should be changed regardless

But keep in mind that the people telling you this make money from
changing
the fluid. But as you say, different "experts" will tell you different
things.
I myself have never changed tranny fluid in any car I've owned, and
I'm inclined to put more stock in what the owner's manual says....
that said, it wouldn't surprise me though if I will need some tranny
work done in the future with this car.


I've been driving 35 odd years, and only flushed a trans once -- my wife's
minivan was doing some spooky stuff, and the repair place pumped in new
fluid for 60 bucks, or so. The spookiness has all but gone away, so me
thinks that flushing a transmission is reasonably expected service. If you
get by without doing it, then fine. But don't close the book on the
possibility that it needs to be done.






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