I am hearing a mechanical noise coming from the rearend on my 2000 Mustang GT. It seems to be based on rotation of the wheels but I cant tell exactly where it is coming from due to the exhaust. I have lifted the car and let the wheels spin at different speeds to determine what is causing the noise but the exhaust drones out the noise when I am under there to determine exactly where it is coming from. I recently had to change out an axle due to a wreck. I bent the axle and so I replaced the axle and pack bearing that is located within the axle tube at the hub. I did not replace the axle bearing. I filled the rear backup with the correct oil but forgot to add the Friction Modifier. I drove this for several thousand miles before figuring out I needed to add the friction modifier. I have just added the friction modifier but that did not eliminate the noise. Can anyone help me determine what this noise is? I am not sure if it is the axle bearing or maybe the ring and pinion is making this noise.
I had some of the same issues. I would take the cover off clean everything as good as you can. Refill and add the friction modifier. This worked for me.
When you say clean everything, what do you mean? I understand there might be small metal flakes or trash or something in the rear but how do you clean the rears? Is there a certain chemical to flush the system out with and then add oil? Example, brake cleaner fluid then let dry and add oil? Appreciate the help.
I just used a towel and cleaned everything up as much as I could. I wanted to use a carb or brake cleaner but didn't know if I would be hurting anything. Also I checked the ring & pinion gear to make sure none of the teeth were chipped. I ended up using AMS oil and Ford Friction modifier. Working great.
