I have a 2007 Rav4 V6 Limited with 136,000 miles. While rotating tires I noticed that the driver side axle had slung grease all the way around (the inside boot-not the outside) the car frame. The thing is, the boot is not torn, cracked, or damaged in any way I can see. The boot is flexible, not dry rotted. So how did the grease fling out? Does this mean I need to replace the axle? I do not have any symptoms of a bad joint yet...no clicking on turns or vibration at speed. I am puzzled at this point. Any help would be appreciated.