Fiat IDEA automatic spins completely

Hello, I have the following problem with a 1.4 16V Idea vintage 2006. Currently the automatic spins, sometimes throws the gear out on idling, that is really very annoying. Besides, it comes mostly after the start when it is cold and you take the return journey so russes the whole car so, that can not be healthy. Unfortunately, the Fiat workshop no longer knows any advice, was only recently there because he had gear problems, there was something leaking and he has “hydraulic fluid” The tank with the liquid is sitting in front of the open bonnet on the left side of the battery under such a protective plate. This was cleaned, replenished, no further error detectable, then went again and the next day already again the problems. In addition, it does not always start immediately, sometimes it needs a few start-ups, but does not know if this is connected with it ? Battery came new about about 6 months ago, can ma Maybe someone knows advice, car has almost 90000km and so far no bigger problems. Greetings