I had the same problem. Had some popping when turning. It sounded really bad. Found out it was the steering stops. It’s a little bolt that stops the wheels from oversteering. Originally I guess it had a little rubber piece that prevents the loud popping. But I read you can apply some heavy duty grease for the meantime. Not a permanent solution but will work for a month or two.
This place sells them on the web. Pretty cheap.
TOYOTA 4Runner/Pickup 4X4 OEM steering stop cap 45619-36010
If I’m mistaken, please someone correct me. Thanks.