Avalon Transmission Whine

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Old 03 Apr 2006, 09:50 pm   #1 (permalink)
Merritt Mullen
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Default Avalon Transmission Whine

I have a 2000 Avalon V6 with automatic transmission. In the speed range
between 30-40 mph I hear a whine (sounds like an electric drill noise).
The sound increases in pitch as vehicle speed increases, but goes away if
I take my foot off the accelerator. Recently, a similar sound has started
occurring between 55-60 mph. Since my high pitch hearing is gone (from
flying noisy aircraft), I suspect the sound is there at higher speeds as
well, I just can't hear it.

The Toyota dealership has diagnosed it as coming from the transmission,
and since I have an extended care warranty, they will repair it under that.

My question is, what is likely to be the cause of such a problem. Since
the sound is related to vehicle speed, not engine speed, I assume it must
be in the output side of the transmission.

What can I expect from the dealer? A complete transmission rebuild? Or
just a replacement of some bearing, perhaps? Or will that not be known
until they open and inspect the transmission?

I am taking the car in tomorrow, and just would like to be a bit more
knowledgeable about the possible problem.

Merritt
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Old 03 Apr 2006, 11:51 pm   #2 (permalink)
eastwardbound2003@yahoo.com
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Default Re: Avalon Transmission Whine

gear wine is a sure sign that your transmissions is wearing out
prematurely. How many miles are on the vehicle? Mostly city or
highway driven? Severe climate where you live? Freezing temperatures,
heat topping 100 in the summer?

Wouldn't hurt to install an oversized transmission cooler once the
warranty is expired. It's heat that kills transmissions and
contaminates the fluid rapidly. The larger trans cooler would prevent
that.


East-

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Old 04 Apr 2006, 01:38 am   #3 (permalink)
jjnunes@sonic.net
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Default Re: Avalon Transmission Whine

Merritt Mullen <mmullen8014@mchsi.com> wrote:
> I have a 2000 Avalon V6 with automatic transmission. In the speed range
> between 30-40 mph I hear a whine (sounds like an electric drill noise).
> The sound increases in pitch as vehicle speed increases, but goes away if
> I take my foot off the accelerator. Recently, a similar sound has started
> occurring between 55-60 mph. Since my high pitch hearing is gone (from
> flying noisy aircraft), I suspect the sound is there at higher speeds as
> well, I just can't hear it.


> The Toyota dealership has diagnosed it as coming from the transmission,
> and since I have an extended care warranty, they will repair it under that.


> My question is, what is likely to be the cause of such a problem. Since
> the sound is related to vehicle speed, not engine speed, I assume it must
> be in the output side of the transmission.


> What can I expect from the dealer? A complete transmission rebuild? Or
> just a replacement of some bearing, perhaps? Or will that not be known
> until they open and inspect the transmission?


> I am taking the car in tomorrow, and just would like to be a bit more
> knowledgeable about the possible problem.


How often have you changed the fluid?
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Old 04 Apr 2006, 12:06 pm   #4 (permalink)
Daniel
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Default Re: Avalon Transmission Whine

Merritt Mullen wrote:
> I have a 2000 Avalon V6 with automatic transmission. In the speed range
> between 30-40 mph I hear a whine (sounds like an electric drill noise).

=============
thought i might have been overly sensitive in noticing a whine sound in
the tranaxle under load - expecting most would write it off as normal
i added lucas transmission fix - no solvents or particulate additives -
to quiet the sound - which it did.
then more recently, started using lesser quantities (8 oz.) ( i
regularly drain and replace the fluid) and the noise has just slightly
begun to reappear, so it seems the concentration is now just right.

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Old 04 Apr 2006, 12:37 pm   #5 (permalink)
Merritt Mullen
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Default Re: Avalon Transmission Whine

In article <1144126294.449861.198400@u72g2000cwu.googlegroups .com>,
eastwardbound2003@yahoo.com wrote:

> gear wine is a sure sign that your transmissions is wearing out
> prematurely. How many miles are on the vehicle? Mostly city or
> highway driven? Severe climate where you live? Freezing temperatures,
> heat topping 100 in the summer?
>
> Wouldn't hurt to install an oversized transmission cooler once the
> warranty is expired. It's heat that kills transmissions and
> contaminates the fluid rapidly. The larger trans cooler would prevent
> that.
>
>
> East-


The 2000 Avalon has 75,000 miles on it, but I bought it less than a year
ago from the local Toyota dealer at 70,000 miles. They had obtained the
car by auction, so had no service records for it. Apparently the previous
owner had not maintained the car properly, as shortly after I bought it, I
notice grey smoke at start up and high oil consumption on the highway. To
make a long story short, Toyota replaced the engine (short block) and
replaced the valve covers which had bad baffles (all done under the
extended care warranty that I had bought with the car). That fixed the
oil problem, it hasn't used a drop since.

I noticed the whine and the fact that the transmission oil was dark (did
not smell burned, however). Toyota diagnosed the whine as coming from the
transmission, and recommended a transmission flush (with BG additive)
followed by a couple of thousand miles of operation to see if that helped.
It didn't. So the car is back at Toyota today.

Merritt
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Old 04 Apr 2006, 02:44 pm   #6 (permalink)
m Ransley
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Default Re: Avalon Transmission Whine

Since the motor was beat up so was the transmission. Hopefully you get a
new one.

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Old 04 Apr 2006, 07:55 pm   #7 (permalink)
johngdole@hotmail.com
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Default Re: Avalon Transmission Whine

The oil consumption problem sounded like your engine had an early form
of oil sludge. Good thing they took care of it or you'll have a blown
engine seizing up on you on the highway. It's a known problem with
these Toyota engines.

As far as the transmission goes, many of them whine, even when owners
change ATF regularly. So it must be a design issue with the inexpensive
Aisin transmissions. If you think the 2000 is bad, wait til you get a
2002+, many of them jerk when down shifting as if trying to find the
right gear. Then Toyota threw out 20% of the parts on the 2007 tranny
to reduce weight ("increase performance" they said). We'll see.

Most of the Camrys I know are sold around 60-70K miles. A friend had
one til 120K and he needed a $2,500 tranny rebuild because OD was
slipping.

I always say to change out the strainer screen while at an ATF change.
Don't just clean it because you can't really clean the screen inside
the strainer casing effectively (think a dealer tech rushing your job).
It's expensive at the dealer for a new strainer, but a Fram kit with a
new strainer and cork-rubber gasket is about $20.


Merritt Mullen wrote:
> In article <1144126294.449861.198400@u72g2000cwu.googlegroups .com>,
> eastwardbound2003@yahoo.com wrote:
>
> > gear wine is a sure sign that your transmissions is wearing out
> > prematurely. How many miles are on the vehicle? Mostly city or
> > highway driven? Severe climate where you live? Freezing temperatures,
> > heat topping 100 in the summer?
> >
> > Wouldn't hurt to install an oversized transmission cooler once the
> > warranty is expired. It's heat that kills transmissions and
> > contaminates the fluid rapidly. The larger trans cooler would prevent
> > that.
> >
> >
> > East-

>
> The 2000 Avalon has 75,000 miles on it, but I bought it less than a year
> ago from the local Toyota dealer at 70,000 miles. They had obtained the
> car by auction, so had no service records for it. Apparently the previous
> owner had not maintained the car properly, as shortly after I bought it, I
> notice grey smoke at start up and high oil consumption on the highway. To
> make a long story short, Toyota replaced the engine (short block) and
> replaced the valve covers which had bad baffles (all done under the
> extended care warranty that I had bought with the car). That fixed the
> oil problem, it hasn't used a drop since.
>
> I noticed the whine and the fact that the transmission oil was dark (did
> not smell burned, however). Toyota diagnosed the whine as coming from the
> transmission, and recommended a transmission flush (with BG additive)
> followed by a couple of thousand miles of operation to see if that helped.
> It didn't. So the car is back at Toyota today.
>
> Merritt


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Old 04 Apr 2006, 09:37 pm   #8 (permalink)
Merritt Mullen
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Default Re: Avalon Transmission Whine

In article <1144198547.866998.49100@v46g2000cwv.googlegroups. com>,
johngdole@hotmail.com wrote:

> The oil consumption problem sounded like your engine had an early form
> of oil sludge. Good thing they took care of it or you'll have a blown
> engine seizing up on you on the highway. It's a known problem with
> these Toyota engines.


Yeah, I know all about the sludge issue. Got a real education (both me
and the dealer). Turned out the primary cause of the oil consumption and
smoke on start up was clogged baffles in the valve covers. Got a full
engine rebuild (including factory rebuilt short block), and still had the
oil problem. That is when I told the dealer about the baffle issue (that
I learned about from this group). New valve covers fixed the problem. I
think they are kicking themselves for not just replacing the valve covers,
which probably would have cured the symptoms. But I am happy to have a
new engine. Hasn't used a drop of oil since.

> As far as the transmission goes, many of them whine, even when owners
> change ATF regularly. So it must be a design issue with the inexpensive
> Aisin transmissions. If you think the 2000 is bad, wait til you get a
> 2002+, many of them jerk when down shifting as if trying to find the
> right gear. Then Toyota threw out 20% of the parts on the 2007 tranny
> to reduce weight ("increase performance" they said). We'll see.


The dealer service department called today and said Toyota had approved
the rebuild of the transmission. They know they need to replace certain
parts, but need to tear it down to check for worn bearings, etc., or
anything else that needs fixing at the same time.

> Most of the Camrys I know are sold around 60-70K miles. A friend had
> one til 120K and he needed a $2,500 tranny rebuild because OD was
> slipping.


I sold my 87 Camry just last year with 135,000 miles on it. Still drove
and looked almost like a new car. It did have a bit of automatic
transmission whine as well, but with no warranty to pay for the fix, I
could live with it.

In the case of my Avalon, the extended care warranty runs out in June, so
I wanted to fix it while the warranty was still good.

Merritt
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Old 05 Apr 2006, 12:01 am   #9 (permalink)
johngdole@hotmail.com
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Default Re: Avalon Transmission Whine

Good thing you have the extended warranty and that Toyota is willing to
fix BOTH the engine and transmission under that. Good deals -- car with
newly rebuilt engine/tranny and extended warranty that's about to run
out in a couple of months!

So Daniel, now you know the tranny whine is attributed to certain parts
that Toyota knows about.

For those owners with extended warranties: get it fixed. I guess for
others fixing it or selling it before it breaks is now an option.


Merritt Mullen wrote:

> Yeah, I know all about the sludge issue. Got a real education (both me
> and the dealer). Turned out the primary cause of the oil consumption and
> smoke on start up was clogged baffles in the valve covers. Got a full
> engine rebuild (including factory rebuilt short block), and still had the
> oil problem. That is when I told the dealer about the baffle issue (that
> I learned about from this group). New valve covers fixed the problem. I
> think they are kicking themselves for not just replacing the valve covers,
> which probably would have cured the symptoms. But I am happy to have a
> new engine. Hasn't used a drop of oil since.


> The dealer service department called today and said Toyota had approved
> the rebuild of the transmission. They know they need to replace certain
> parts, but need to tear it down to check for worn bearings, etc., or
> anything else that needs fixing at the same time.
>


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