Revo has a central, as well as rear diff lock. Front/rear axle lockers should only be used on low speeds. Central diff lock under 4H can be used at high speeds, for example sand dueling or mud dueling. Please note that Revo has mechanical lockers.
Sportage, while I havenāt seen any documentation, Iām sure doesnāt have mechanical lockers. Iām not sure if itās permanent AWD or only when you engage AWD. Either way, Iām sure its central diff lock isnāt really mechanical and more computer-controlled, so you can use it at whatever speed you want and the computer will determine if its really engaged or not.
