Up until recently the trim on my Supercub has been very smooth and easy to adjust. At some point recently the trim now has quite a bit more friction when turning. Its not to the point that it is alarming but it takes a bit more pressure to rotate it. The movement on the stick still feels the same as it always has. Pulled apart the crank assembly to confirm that pulley was free and clear. The yoke and jack screw have plenty of lube. Scratching my head trying to come with ideas of what is causing this. Any suggestions?