If you need to conduct maintenance for your Honda X4 then it will always be a good idea to have access to a Workshop Manual for reference should you need to know the right way to strip off a particular component including Gearbox and install it again correctly.
Honda X4 Workshop Manuals can provide specified diagnostic info for the car so if something is wrong it will help you figure out what the situation is and ways to resolve it. You can then analyse if you can do this on your own or if ever the job is simply too big you could make a reservation for your X4 in to a trusted repair garage.
Honda X4 manual