Just my 2 cents for my experience replacing:
I ordered a cheapo off Amazon for 25 bucks and have had no problems. I thought about the whip antenna idea but I kind of like seeing it go up and down. As others have stated, good to take that motor out, open it up and see if any broken pieces in there.
I've got this same issue on an 01 T4R I recently bought. Bought a new OEM antenna and it did the same thing only louder; grinds for about 7-10 seconds after the antenna is up.
I'm going to try a new product called "AntennaMastsRus - Conversion Kit is Compatible with Toyota 4 Runner". Has anyone tried this and what was your result? I'm guessing the motor still hums for a bit then quits. Is that what happens?
It's too bad there isn't a separate button to raise or lower the antenna. Chances are they wouldn't go bad because they wouldn't raise and lower every time the car was started or stopped with the radio on.
OKay, Pulled motor and cleaned.
1st New OEM mass retracted smooth , then pulled cable cord out of mass.
2nd mass retracted smooth . Came up fully, nice but motor continued to push. Sounds like its spinning or grinding on teeth, Loud. Retracts fine .
I disconnected power to motor. I would like to be done with motor and go with standard if they make a standard retro fit antenna that gets good reception.
I sure would like some input. Not sure about 69bucks for small 7" whip type?