Question about 1996 Audi A6

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1996 Audi A6 Transmission Problems

Hello, Hopefully you may be able to shine some light on my problem. I own a 1996 Audi A6. The other morning I started my car and went to put it in gear and hit the gas to go and the vehicle did not move (trans is slipping). After screwing around a little I now realize I have Reverse and 1st only. What I mean by that is: if I put the car in "D", 3rd or 2nd, the vehicle will barely move forward under its own power. However, I also figured out that if I manually select 1st gear and start out with that the shift gears manually it will operate normally through all other gears except 4th which I assume is an "OD" gear. I have checked my floor boards and they don't appear to have had water leaks. The passenger side was "damp" but I live in MN and its winter here right now (snowy boots and such). I also went to the trouble of pulling up the carpet on the passenger side foot well to see if I could see/smell signs of water damage and found nothing. The fluid is clean and appears to be full from what I can tell, but without a factory scan tool I know I cant be 100% sure. I have check the fuse in the dash fuse panel and found nothing (have checked all fuses actually). I have also inspected all electrical connections at the transmission. I did find one, which one Im not sure, that had some slight corrosion. I cleaned it with spray lube (Deep Creep) and a wire brush, then cleaned again with 3M Brake Parts Cleaner, air dried, then to insure no future leaks, sprayed some white lithium grease in the connection. No change in transmission performance at all. In my research I have found a few people that have mentioned a N88 solenoid that is prone to failure. I have no way of knowing how to test this on my own. I have scanned the TCM and found a 00753 code. Unsure of where to go from here. Any help would be much appreciated. Thanks In Advance! -Russell

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A friend of mine has a 96 A4 with an automatic, with basically the same symptoms as you are seeing. What we found on his car was that the TCU (transmission control unit) was bad. It's under the carpet, passenger front. Pull up the carpeting and you'll see a black box with a big cable going into it - that contains the TCU. We put a TCU from a tiptronic car in, and the behavior of the transmission changed dramatically. It was not a fix (tip and non-tip TCUs can't be interchanged) but we did see that it wasn't a band problem in the transmission - whereas with his original TCU he had to drop it to low gear and get the car moving before it'd shift for itself, with the tip TCU the car would start out in drive just fine, but wouldn't go over 3rd gear. He's sourcing a TCU now to replace his.

Your alternatives for this would be (in my recommended order) - rebuild your TCU via www.modulemaster.com, buy a used one with matching numbers from www.shokan.com, or cringe as you go to a dealer to shell out almost $1600 for a new one. ModuleMaster has a great reputation in the Audi community for quick turnaround, great work, and warranty-backing of its work, and Shokan is an Audi-specific salvage yard in upstate NY that deals in these cars exclusively. Check them out and I am sure that either can supply you with a functional TCU.

Posted on Jan 03, 2009

  • whitetatiana Aug 20, 2011

    I hope will help me out caz nobody told me that,I have the same problem and i was told i need a transmission oil flash and nobody wants to do this they just want to put a new transmission on witch is a lot. I was told after 173000 miles i need a new transmission. I need a advised caz I think something is wrong.

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Iv'e been in the transmission industry 30 years . European units are the fussiest by far. Do yourself a BIG favor. Find an established owner operated TRANSMISSION shop in your area and let them deal with it. I say transmission shop and not a full service shop that does trans work along with everything else. Very important to have trans techs on site as full service shops just do not have guys that know this stuff. What they'll do is pull out the unit & send it out for overhaul. Then if it turns out it's an electrical problem on the vehicle you spend all that money and still have a problem. A transmission specialty shop knows how to properly diagnose & go right to the problem.

Posted on Jan 15, 2012

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I have a car that has 100 % same symptoms, i have gone to junk yard and got my self 4 TCU and none of those four solved the problem, I have checked that they were the same part number. I am still researching this problem, will post back when I figure out what the problem is.

Posted on Aug 30, 2011

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Sell the car and by another one... That's what I did.

Posted on Jul 15, 2009

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