Happened to me last spring, sounds like you need to replace it. Not that tough of a job. I bought my replacement off of ebay for about $20.00. The install took about a half hour.
Most likely the plastic track inside the antenna broke apart inside the motor. What i did is took the entire assembly out of my car.
1. Take out of car. (Usually held on with a few bolts.)
2. Unscrew cover the to the motor housing.
3. Locate the piece of track that is broken off inside.
4. Put on the new antenna. You will probably see that the instructions say to turn ON the radio, and then feed the new antenna track attached to the metal antenna down into the motor.
Then turn the radio OFF and let the plastic track slide into the motor.
This should pretty much take care of it.
Im sure there is a site with better instructions on it, when i bought the antenna off of ebay it came with online tech support.
Hope this helps
Chris
←
Thanx guys. I will try buying on ebay and replace it myself..