I've searched for the answer with no luck. In my '02 LC with factory nav, the antenna goes fully up with the radio on, and fully down when the radio or truck is off, as expected. However, when I manually lower it, it doesn't retract all the way but stays up about three inches. Also, when I change from radio to tape or disc, it doesn't retract as I would expect (as my '99 4Runner did) but stays at full height. Is this normal?