The 2 neurologists i have seen told me this...but we may not have the same type of tremor if that makes sense.
I went to a neuro concerned about tremor and als and was told the only thing that even resembles a shake or tremor is due to muscle weakness, and it is NEVER a resting tremor. As in, you do not sit there and shake.
There is a website with an article from an ALS neuro that states the same.