I went out with a flashlight to check the coupler. The cap that is clamped onto the end by tabs has come off, looks like the grease has come out too. I think you are 100% correct there. I will re pack it with grease and try again in the am. Boy I hope this fixes it!!! We did have a few days of moister here, and 20's for lows. I don't know if the lower temps had anything to do with it, but the loose cap and missing grease would certainly do it.
