[lsupcar]

Update.
I think it is fixed.
The shop replaced the transmission control module with a good used unit and the binding in sharp turns when going backward and forward seems to be gone.
The shop told me to take it and drive it for a week or so to make sure the binding does not return. Knock on wood I hope I didn't jinx myself by declaring victory.
Now to find out how much the shop will charge for about one year of work. Haha.