Yeah take it to your local rip off power wand type place and wash it off underneath real good. Then see what you hear. I've had a rock behind my rotor befroe and it made all kinds of noise.

But if it only happens in 4wd....Give us a bit more info.

A gun in the hand is better than a cop on the phone.

98 Passport 33's, Supercharged, Calmini Bumper, rockbars, diff drops, Teralows, 4.77's, Aussie and ARB lockers, Safari snorkel, Optima red top.