my gearbox doesn't react when trying to change gear, there is no faults on diagnostics , when connected to the fiat program it does change gear only for reverse when engine is off or its running but when it comes to get 1st gear or any upper one looks like its trying but has no enough power and sounds like kind of chocking.... i was trying every single mechanic but they have no clue whats is going on, fiat dealer wants too much.. if anyone have an idea what it might be pleas help 
