Pajero have greasable ball joints as well as wishbones. Suggest you have the front end of your ride lifted and have them greased up. If your ball joints or wishbone are missing grease nipples, you can buy them off the market and put em in place. Also, while your having this done it will be good to have your drive shafts greased as well. I have this procedure done every two to three months. Your steering will also feel a bit lighter once you have done this.
P.S A quick link to all the Mitsubishi Pajero FSM's. Hope this will be a help to all.
http://mitsubishilinks.com/