Thanks for the prompt reply. I know I felt it shift (it was very easy pedaling to start, then gave some more resistance at about 6mph). I did not feel it shift twice but I guess it means that the dynamo must be working and the speed sensor must be working somewhat. I did notice that it seems like I have to come to a complete stop and start again for it to shift to the easy pedaling. The weather has gotten bad here and I really haven't looked at it beyond my initial ride. Are there any (short) cable housings involved or anything to lube?