Chain dragging sound/noise - 93 4runner V6-RWD-AT

Hello Everyone,

I've been trying to figure out a very odd and intermittent sound which appears to be coming from my front end perhaps the brake/wheel area.

Over the last few months, I've replaced the wheel bearings with Timkens, remanufactured brake calipers from Toyota, brake pads (inexpensive brand from RockAuto). I upgraded my wheels to 17th inch OEM from a 4th gen Tacoma. The rotors and backing plates look good.

I do know I need to replace my inner and outer tie rods. I have a small leak on my power steering pump but I don't think its coming from there.


The sound shows up at random times, it honestly sounds like I'm dragging a chain and its rattling under the car. When I speed up it gets louder. It goes away after awhile but I dont know why. I usually just slow down and press the brakes a bunch of times.


Here is a recording of the "dragging chain sound" - HERE


I recorded it after going over train tracks at less than 25 mph. After I recorded the sound stopped. I went over speed bumps afterwards but didnt return.


I cant replicated it when I'm at my house and when I lift the front end I don't see anything that is loose.


Any ideas or suggestions on where to look?


Thanks again.

 

Drive shafts (DS) and u-joints perhaps. The t-case is chain driven for the front DS but its bathed in gear oil unless its all leaked out. Steering Idler arms on these rigs are very week and prone to failure of the bushings and in some case the shaft will snap with big tires and lots of off-road abuse. As things get warmed up with the heat load from the motor and exhaust and drive train noises will come and go as the temperature of the components change and clearances can constrict or enlarge. So this will have some bearing on the noise and when it will appear and/or go away.

 

I will check the DS, u-joints, and steering components. Its a 2wd so I don't have a transfer case. I appreciate the suggestions and advice. I'll report back once the weather gets better over here.