The passenger side window in my '48 Chevy truck has suddenly become stubborn. It can be raised up only about 1/3 of the way, and then lowered. It feels that it is getting bound up somewhere at this 1/3 up point. Prior to this time, it freely was able to be fully run up and down. Any thoughts on a diagnosis of the problem, and the remedy to get it back in working condition? Thanks. LUKE
