Transmission Chatter 1993 V6 Automatic

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Old 13 Oct 2006, 05:46 pm   #1 (permalink)
c
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Default Transmission Chatter 1993 V6 Automatic

I just noticed today that when backing up, the transmission seems to
chatter a bit when first starting backward. If I firmly apply the brakes
and apply moderate throttle there is no slippage. Only when the vehicle is
allowed to move. Forward operation is normal.

I'm the original owner with 90k easy miles; the fluid has been changed a
couple of times...and appears a bit "grey" now...not the light red color of
new fluid....but doesn't look bad either.

Any suggestions or comments? I imagine that the dealer will say that it's
nothing that a new transmission won't fix

Thanks for reading, Chuck


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Old 13 Oct 2006, 08:22 pm   #2 (permalink)
johngdole@hotmail.com
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Default Re: Transmission Chatter 1993 V6 Automatic

Besides checking the level and condition of the ATF, which is the first
thing to do when looking at transmission problems, is to change the
fluid and strainer. Use a new strainer and gasket as in the Fram ATF
kit. Don't try to spray compressed air at it because that doesn't work.
Have you ever changed the strainer?

You'll probably notice a lot of black shavings in the pan and coating
on all the parts in side. That's why I would change the strainer at
least every 24-30K miles. The Aisin is a very dirty transmission
without a decent filtration system (so consider draining and refilling
ATF and differential every 15K miles). The dirt leads to valve/piston
wear/sticking and leads to sluggish ATF pressure rise, and accelerated
clutch/brake band wear is the result.

Try changing the fluid, strainer and gasket first. Cost about $25 in
parts. I wouldn't use a machine to flush the tranny before then.

If you are not mechanically inclined then you probably have capable
friends who are willing to help. Otherwise a reputable independent
mechanic is the choice. But with only drain and refill using the
specified intervals, I'd say 120K miles is about rebuild time.


c wrote:
> I just noticed today that when backing up, the transmission seems to
> chatter a bit when first starting backward. If I firmly apply the brakes
> and apply moderate throttle there is no slippage. Only when the vehicle is
> allowed to move. Forward operation is normal.
>
> I'm the original owner with 90k easy miles; the fluid has been changed a
> couple of times...and appears a bit "grey" now...not the light red color of
> new fluid....but doesn't look bad either.
>
> Any suggestions or comments? I imagine that the dealer will say that it's
> nothing that a new transmission won't fix
>
> Thanks for reading, Chuck


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Old 14 Oct 2006, 12:07 am   #3 (permalink)
Platini Kwok \(BestEngineering\)
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Default Re: Transmission Chatter 1993 V6 Automatic

Hi,

Yes, I agreed the suggestion. The method mentioned below give a more clear
environment for gear box fluid.

Platini
<johngdole@hotmail.com>
???????:1160788955.078654.80350@b28g2000cwb.google groups.com...
> Besides checking the level and condition of the ATF, which is the first
> thing to do when looking at transmission problems, is to change the
> fluid and strainer. Use a new strainer and gasket as in the Fram ATF
> kit. Don't try to spray compressed air at it because that doesn't work.
> Have you ever changed the strainer?
>
> You'll probably notice a lot of black shavings in the pan and coating
> on all the parts in side. That's why I would change the strainer at
> least every 24-30K miles. The Aisin is a very dirty transmission
> without a decent filtration system (so consider draining and refilling
> ATF and differential every 15K miles). The dirt leads to valve/piston
> wear/sticking and leads to sluggish ATF pressure rise, and accelerated
> clutch/brake band wear is the result.
>
> Try changing the fluid, strainer and gasket first. Cost about $25 in
> parts. I wouldn't use a machine to flush the tranny before then.
>
> If you are not mechanically inclined then you probably have capable
> friends who are willing to help. Otherwise a reputable independent
> mechanic is the choice. But with only drain and refill using the
> specified intervals, I'd say 120K miles is about rebuild time.
>
>
> c wrote:
>> I just noticed today that when backing up, the transmission seems to
>> chatter a bit when first starting backward. If I firmly apply the brakes
>> and apply moderate throttle there is no slippage. Only when the vehicle
>> is
>> allowed to move. Forward operation is normal.
>>
>> I'm the original owner with 90k easy miles; the fluid has been changed a
>> couple of times...and appears a bit "grey" now...not the light red color
>> of
>> new fluid....but doesn't look bad either.
>>
>> Any suggestions or comments? I imagine that the dealer will say that
>> it's
>> nothing that a new transmission won't fix
>>
>> Thanks for reading, Chuck

>



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Old 14 Oct 2006, 08:45 am   #4 (permalink)
m Ransley
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Default Re: Transmission Chatter 1993 V6 Automatic

Change the fluid and filter, or strainer as some call it, but it actualy
filters. The color is bad so you realy have waited to long.

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Old 14 Oct 2006, 01:21 pm   #5 (permalink)
EdV
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Default Re: Transmission Chatter 1993 V6 Automatic

All of the answers are correct. I would just like to suggest that after
you filled the transmission with ATF, you have to slide your gearshift
a number of times and check the level again. You want to circulate the
ATF and fillout all the cavity inside.

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Old 15 Oct 2006, 11:34 pm   #6 (permalink)
davemac
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Default Re: Transmission Chatter 1993 V6 Automatic

The grey color of the fluid is probably an indication of a failing
clutch pac. Reverse takes the highest hydraulic pressure. When you
increased the throttle before moving, you increased the hydraulic
pressure somewhat as well which prevented you feeling the slippage.
You can try a fluid and filter screen change, but at this point, you
may need a rebuild. I would have a pressure test done ASAP after you
change the fluid rather than continue to drive it. But then again, if
it is too late, it won't matter all that much.

dave mc

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