Experienced it on the Pajero. Greasing the rod only help a tiny bit. In my case, the internal seal moving in the cylinder is producing that annoying sound like VR2 mentioned. U can try different brand of fluid.Haha the sound is driving me crazy.. imagine the daily traffic and the frequent squeaks in need to hear... Nyekkk nyekk nyekkk nyekkk~ omg going crazy. I have to fix the sound before i go crazy lol.
Ended up just ignoring it. Its a 4x4 so additional mechanical sound comes as standard. If no sound then something is wrong...hahahah.