Toyota Prado150 Squeal Noise From Underneath Vehicle.
Prado 150 Loud Squeal/Squeak Noise from underneath while driving at any speed. The noise on this Prado was occurring at low speeds in this instance, however does also occur at freeway speeds. The noise appears constant in pitch and amplitude and does not appear to change with driver input such as braking and turning. Vehicle needs to be driven for at least 30 minutes before noise can be heard. We have never been able to reproduce the noise while driving the vehicle on the hoist. We have successfully repaired 6 Prados by replacing the front output shaft companion flange and transfer case front oil seal. Noise appears to be generated by contact between the flange dust seal and transfer case oil seal metal ring. This repair was performed after confirming that there was no contact between the brake pad wear indicators and rotors and no foreign objects stuck between rotors and backing plate.