The 100 series rear wiper has always been kinda sad on my truck and always chattered acorss the rear glass. There never seemed to be the right amount of pressure, with a new blade or old blade. I heard about the new Rain X, Latitude wiper blades and went and picked one up on Saturday. It was 16 dollars. It is actually slightly bowed out and when installed seems to apply constatnt pressure on the glass. I installed it Saturday and this morning it rained. The new wiper works like a champ. Highly recommended 16 dollar mod. This seems to be 100 specific. Our GX rear wiper works great and seems to be a more modern design.
http://www.rainx.com/Products/Wiper_Blades/Latitude.aspx
http://www.rainx.com/Products/Wiper_Blades/Latitude.aspx