Just started noticing this after some recent service. Related, I'm not sure yet.

When slowing down, either coasting, or using brakes, I notice a low ruble/shake from the rear of my Jeep. Occur only momentarily ,between 5-10 mph. My tires seem to be wearing even (32" Mud Ter, 30,000 miles). I just had the front and read diff fluid changed, and just rotated the tires.

Related to tire wear? Brakes? Diff service? Something else?