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Thank you! The original problem was that the last owner ran the incorrect transmission fluid, this caused a breakdown in the seals and thus most of the fluid leaked out (except about 1 letter). They continued to drive the car and an overheating condition. This condition lead to most of the clutches and drums to fail.

I do believe that both the Audi 01N and VW 01M share commonality except that for gear ratio. They also share the same electrical connection configurations. However, if you install a VW trans into an Audi it would drive but the transmission computer would immediately show trouble codes because the drum speed sensors would be reporting incorrect speed data. The trans computer uses this data to command shift timing to the valve body. If this occurs the trans computer will default to "limp mode" and only run in 3rd gear or reverse. The only way to correct this issue is to reflash the computer for the new transmission configuration. This can only be done by dealer computer systems. I have found one company that can reflash it but they cannot guarantee it will work when complete. It's safest to match the same type and style transmission that the vehicle was intended to have during initial manufacturing.

same problem may happen to our audi a4, my younger brother never opens the hood himself, I do that for him occasionally when it happens. so one day the car totally lost cooling liquid (antifreeze), engine overheated and he is been driving like that for weeks, have no idea how long, I just saw that and immediatly bought cooling liquid, I still wonder how the transmission is still working. I have also noticed that transmission tray gasket is leaking, so I guess he also lost some automatic transmission liquid. So I'm planning to replace gasket and fill with fluid, and hope that there is no hole in tray itself, also one bolt was absent from tray. Many thanks anyway, yes, these 01N and 01M are almost same with some minor differences. I feel that I wont be able to find new gasket and waiting would be is too long, so I guess I will have to clean old one and use some gasket silicone and put it back like that, do you know is there any pressure in the tray?

The gasket is most likely leaking because it has been overheated or the wrong fluid. If the fluid level drops more than one letter it will cause cavitation of the pump and valve body. This causes the clutch drums to heat up as well which causes the clutches to wear excessively. It concerns me that the antifreeze ran out, the transmission has a cooler on top that oil from the trans runs through and cools the trans fluid via heat exchange. If the trans fluid was running low AND you had no antifreeze in the cooling system then it is likely you have permanent damage over several international components of the transmission and drum stack ups. If you are going to try and save it, you must use a genuine dealer oil pan gasket and filter. Once you have the filter off, cut it open and inspect for sludge or debris. If you find either you MUST overhaul the entire transmission or you will run into problems when that debris works its way into all the components. If you don't see any evidence of

The above then you will have to reinstall the pan (special torque and sequence) and refill with dealer fluid. This is also a known cause of leaking pan gaskets. This fluid is rather expensive, it will cost around $150 for all the fluid you will need consult your dealer parts department for amount you will need. Lastly you will have to fill the trans only 1/2 way then connect the vehicle to the dealer scanner (or capable) that can place the valve body in "fill mode", if this is not done you will get air trapped in the valve body that will cause hard or hesitant shifting behavior. Hope this helps.

Hello and thank you for the question. Wow ya know this was such a long time ago that I have since thrown out that sheet. I remember I found that service bulletin on line I remember for free. If I come across it I will share in the comments. Good luck!

Richard Taylor Oh thanks for reply :) If you find something about this guide book pls share with me. 🙏 I checked on ATSG web page but I didn’t find anything :/ If I find something I will buy as a PDF. Thx Stay safe 🙌

Can you share this manual please....

I have the whole manual for sale for $50. It has complete information on this transmission and also all service letters included.