I ended up buying another 03 RS6 that recently went up for sale. This fits the bill of a project car more than my current one and I can have it non-running for however long i need.
Story goes: guys gets it from friend. Trans is shot so he buys a "good, low miles" used trans.
Issues arise from the shop, he pulls the car out and works on it himself.
Gets the car together again but still not working. He basically decided he's not taking it with him when he moves.
Here's the issue:
1. No reverse
2. Speedo does not work
3. the center display on the gauge cluster does not work.
4. looks like it goes into limp mode. When started you can drive forward slow or if you step on it, it would accelerate. sometimes it would stay in gear most time it would "disconnect the trans" and you cant accelerate UNLESS you turn off the car and start it.(then same thing would happen)
5. stuck in first, it doesn't seem to shift up.
concern:
1. I dont trust buying used trans, specially used auto trans. So I think its very possible that the guy sold him a bad trans.
2. Maybe his old trans was good and its something else thats broken? any common electronic or solenoid that goes out on this car? He mentioned he had the TCU repaired but it didn't do anything.
Upside. I do have my other RS6 that's fully functioning. While I don't prefer to do it this way(because of time), I do have an option to remove and try solenoid/sensor/tcu/etc to see if that's the culprit.
Just wanting to see what are the common checks first/where to start since I bought it none running.
more importantly, I also wanted to know if the trans is shot before I start planning for a manual swap.
Thanks