Changing current player object

In an open world setting, where I already have a vehicle and a player spawned, I want the player to be able to possess the vehicle or vice-versa without writing a separate player controller for handling input.

The server has this code which does the job fine while the host, but as soon as I try this as a client it quickly overflows the connection causing the client to timeout:

Code (CSharp):

1.     public void ChangeOwnership(NetworkConnection ConnectionToClient, GameObject NewObject, short PlayerControllerId, GameObject OldObject, CarController TempFocusedObject)
2.     {
3.         if (isServer)
4.         {
5.             TempFocusedObject.PossessVehicle();
6.             NetworkServer.ReplacePlayerForConnection(ConnectionToClient, NewObject, PlayerControllerId);
7.             OldObject.SetActive(false);
8.         }
9.     }

Is there any way in which I could change the player object much more easilly?
Edit: upon adding if(islocalplayer) to the vehicle the car no longer moves which means it doesn't get replaced for the connection

 

Right, so I ended up making a decision to instead use a charactercontroller that can posses the object and execute functions on it