I know this is not a new thing but I figured that I'd share my results in case anyone is considering going fanless for the winter. Took the fan and shroud off a few days ago just to try it out. Get much faster warm up now. Engine temp stays normal, but will start to climb if truck doesn't move for over 15 minutes (may be an issue in traffic, but the chances of me getting stuck in traffic around here are slim to none). Also, my smoke is reduced, especially when the engine is cold. Seems to me like it's a good option for winter driving.
Sean
Sean