a8 3.3 automatic gearbox def.

hi, audi friends,
I had 6 years a8 `94 no quattro. No autom. no big extras!!! and since I have never had problems, I have a8 3.3 bj.01 since c. 1 year, the last 1 month I only have problems with it !!!!!
1. my water tem. display .themostat def.
2. Then air mass def.
3. a.b.s. hydr.block leaks (I have grown the linings)
4. thenach all the biggest shock,automatic gearbox def. ( the backward passage) the most common. workshop says pe. computer that the converter def. is, but I don't know what really def.
as beautiful as he is but it makes me no fun anymore !!!!
who can help me there further, or the same mistake as I had!!
p.s. the car I can drive to NOT !!!!!! Of course only forward!