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Thanks For All Of Your Support And Help With My Transmission Saga, Here's The Latest..

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Old 11-22-2002, 05:25 AM
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Default Re: What tranny coding do you have?

Why can't you drain the torque converter? you can on all other tranny's........JOHNA8 4.2
Old 11-22-2002, 06:16 AM
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Default Not quite sure

The tc is in the bowls of the tranny and it's full of oil, correct? The drain plug is at the bottom of the pan.

The tranny holds 9 quarts (I think) and the Bently states you can drain 4 qts, the rest stays in the bowls of the TC. In actuality, it's about a six quart change out when you drop the pan.
Old 11-22-2002, 07:30 AM
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Default It's Recoded However, I Didn't notice Any Difference And Yes..

I am already on top of that one. My mechanic suggested yesterday that he wants all of the other stuff out of there and it may take a little more doing. He wants me to drive approximately 1000 more miles and then have the fluid only flushed once again to be absolutely certain.

dommi3/Tiburon, California
1997 A8 Quattro Silver/Gray
17" Audi Wheels
All Available Options
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Previous Audi

1990 V8 Quattro
Old 11-22-2002, 07:59 AM
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Default More Info Related To My Research When Talking With Fluid Manufacturers

When I spoke with Swepco for instance I spoke with the head Technical Project manager. He claimed it was fine for ZF transmissions. I asked what proof does he have, and he said he had a letters from both ZF Germany and from ZF headquarters in the US stating it was cleared by ZF to use the Fluid. I asked him if he'd be so kind to fax me a copy which he did. Yes, there are such a letters but when I read deeply into the letter that approval was specifically for the ZF transmission used on a bus for the Phoenix transportation district. I'm sure the fluid is okay for that transmission but what about the very specific one we have on our A8's?

I know for a fact that there are serious differences between the A8 ZF transmission and the other ZF transmissions there are on the market. Mainly because of the Quattro system. I can't even tell you how many ZF Transmission rebuilding shops I spoke with that said sure I work on rebuilding ZF transmissions. I said I have an Audi A8 and then their tune changed. Sorry, that's one I won't get near. Because of the Quattro system it has completely unique qualities and they won't get near it. The one that is most local to where I live was Peter Schmidt transmissions in Burlingame California. He knows ZF transmissions backwards and forwards for Benz, BMW etc. I couldn't convince him for the life of me to even look at mine when I mentioned I had an Audi A8 Quattro.

Interestingly enough, Even Peter Schmidt's shop agreed with the others. There's simply no such thing as life time fluid, change it out @ 50K intervals with the filter and only, use the Audi recommended Transmission fluid. If it is as unique as everyone claims it is, and I know from years of experience of owning this car that many parts on this car fall into that category, then we are dealing with a very different beast here and it's requirements are very specific.

dommi3/Tiburon, California
1997 A8 Quattro Silver/Gray
17" Audi Wheels
All Available Options
-------------------------
Previous Audi

1990 V8 Quattro
Old 11-22-2002, 03:52 PM
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Default Re: More Info Related To My Research When Talking With Fluid Manufacturers

It would be interesting to know which transmission version is installed in your car.
Build Date: Version
7/96-11/96 DPZ
11/96-2/97 DSM
3/97-1998 DTE
The build date is on a plate in the drivers door frame and the transmission version is on the transmission and should be on a tag in the trunk (the latter missing in my car). This info would be helpful in cataloging problems to version.
Old 11-22-2002, 05:26 PM
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Default Re: Why you can't drain the torque converter ...

<center><img src="http://static.howstuffworks.com/gif/torque-intro.jpg"></center><p>.
The torque converter is a turbine that's fluid coupled to another turbine, with both enclosed in a bagel shaped housing.

The housing is bolted to the the flywheel and rotates at engine speed. Normally the housing doesn't even have a drain plug, so at best, you can only drain about half the ATF fluid from it. If it does have a drain plug, you can drain all the fluid only if you rotate the housing so the drain plug it on the bottom.<ul><li><a href="http://www.howstuffworks.com/torque-converter.htm">HowStuffWorks.com -- torque converters</a></li></ul>
Old 11-22-2002, 05:32 PM
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Default Of the three Audi 5-speed ZF transmissions ...

.
which is used in the A8/S8?

Is it the same for all model years?
Old 11-22-2002, 06:46 PM
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Default

You know, ZF has offices and tech people in Vernon Hills, IL at (847)478-6846
Old 11-22-2002, 09:15 PM
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Default Yes.........

I mention some letters I was faxed from the Swepco Technical Project Manager further down this thread titled:

More Info Related To My Research When Talking With Fluid Manufacturers - Dommi3 2002-11-22

Both of those letters came from that Vernon HIlls office, one being a forward from ZF Germany.

It may be a good idea to contact them next if we have any further concerns. I've pretty much made up my mind at this point based on the data I was able to gather in the time frame I needed to.

Dommi3/Tiburon, California
1997 A8 4.2 Quattro
Silver/Gray 17" Audi Wheels
Every Possible Option
-----------------------
Previous Audi

1990 V8 Quattro
Old 11-22-2002, 11:22 PM
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Default DSM For Me

dommi3/Tiburon, California
1997 A8 Quattro Silver/Gray
17" Audi Wheels
All Available Options
-------------------------
Previous Audi

1990 V8 Quattro


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