Although I did try looking up your codes. I couldn't come up with anything. There was a brief mention about your codes on the Ramcharger Central website. But it was still pretty vague.
If you can't pull up any codes then...
The next best way to tell what it really is to take it apart and see how many clutch discs you have. And to see if you have 3(904) or 4(998-999) planetary gears.
This is when I first took it out of my A999:
(As you can see on the right, there are 4 planetary gears)
Oh yeah try to find out if its lock up or non lock up: