When you jack up the rear of the vehicle allowing the rear axle to hang freely lower the ramp so that it is at a comfortable working weight for you while underneath the vehicle, then using your hands and fingers feel round the axle pressing in various locations. Use a mirror to see the top sectional area of the axle, you’ll see it every time. Also when you are inspecting the rear wheel and tyre you can look between the wheel arch in front of the rear wheel and you will see the axle casing there.Remember also you can use a small pinch bar to check for excessive free play in the axle bush/mounting.
