Yes, it is a click-click-click sound. It's much louder when I'm going slower, sometimes inaudible when I'm going 40+. Can you clarify what you mean with axle nut being loose?If its a clickty-click noise at slow speeds or going from forward to reverse, more than likely its the wheel bearing failing. You can take the wheel off and check to see if the axle nut is loose, but my guess its the wheel bearing.
How did you replicate the noise with the car up in the air?It's definitely not the axles. The wheel bearings seem to be going out... if they're in the early stages, they might not make the noise when the car is up in the air. I chased that problem for almost a year on my GS300 before it got bad enough for that noise to be present once I raised the car on a lift.
I jacked the passenger rear wheel and tried spinning it (when I was looking for play on the wheels last weekend)... but it wouldn't move freely. Did I need to raise both sides? I thought that since I have the stock LSD, it didn't matter? ThanksJack the rear end up, and try to spin the tire freely in neutral to see if the noise occurs.
Actually dude, I tried it a little bit again another night with applying the brakes and the noise was still there. Kinda inconsistent noise. I still don't have any weird vibrations or pulling or handling issues... The frequency increases the faster the wheels turn, but the quieter they get too. It's more audible at slower speeds... Will have to wait I guess. I did notice my rear pads getting a little low and the anti squeel shims getting close, but still within Toyota specs...The sound goes away when he applies the brakes. So I wonder if the brakes are somehow stabilizing the wheelbearing?
Yes, also the dust shield could be slightly bent and rotor rides up against it.Would warped rotors do this too? Slow speeds sounds like metal scraping intermittently...