A couple of weeks ago I noticed a squeaking sound coming from my driver's side back tire. It sounded like a bearing when it is going bad. My dad and I pulled off the wheel and took the drum off and noticed fluid leaking from around the bearing leading into the axle. When the tire is on the truck you can see fluid marks on the inside of the tire underneath the truck. Is this likely differential fluid or brake fluid? Is it likely a seal around the bearing or something else? Any ideas on how difficult to repair?

 

Is it brake fluid or oil?

If you know what the fluid is, then that will tell you if it is an axel seal of a leak on the wheel cylinder. Axle seal is a little harder to replace but neither is a good thing!

 

I don't think it is brake fluid, but only because when I check the brake fluid resevoir, it is not low at all. So, I am thinking it must be coming from the diferential. How complex a job is it to replace that axle seal and bearing?