If you want to do fixes on your CPI Hussar then it is always recommended to possess a Workshop Manual to use as a reference in case you need to know the best ways to take off a certain part much like the Gearbox and fit it again accordingly.
CPI Hussar Workshop Manuals are able to offer detailed diagnostic info with regards to your vehicle therefore if something is broken it can help you understand what the issue is and tips on how to repair it. Then you are able to determine if this can be achieved by yourself or in the event the job is simply too big you could make a reservation for your Hussar right into a suitable car garage.
CPI Hussar manual