I'm getting a "thumping noise" when applying light pressure on the brake pedal. Seems to be coming from the rear. This just started and at first it would appear only when coasting around 40mph. If I applied the brakes or gas it would subside. Now it only presents when I lightly step on the brake. Brakes were done about 3 years ago -Hawk High performance ceramic" never had a problem and the rotors are not warped.
I don't see anything apparent under the vehicle. The only thing that I noticed ,and I don't know if it's related or coincidental, but it appears that the rear pinion seal is starting to leak I have about 80k on the Jeep. Any ideas?