My Rodeo 1997 3.2L engine 4x4 works but makes a repetitive clanking noise in the right front of the car when I engage the 4x4. When this first happend, I added grease to all the grease joints and it went away temporarily. Now its come back. Does anyone have any idea what the problem might be? I am thinking the right front drive shaft might need replacing or maybe there is an issue with the front crankcase. Checked the fluid level and its ok.