Have noticed a squealing, rumbling noise the last couple of times i've drove my Disco 200 93'. Driving round right hand bends is mainly when the noise happens. Last night i was driving home when the noise suddenly appeared again, a weird grating kind of noise and one of the left hand wheels locked up at 30mph(not sure which wheel yet). Reversing a few feet released the wheel and allowed me to limp home. Brake pads and calipers appear to still be in their correct positions. Anyone got any pointers b4 i start stripping please?