What will happen to my part of the class action suit if I die before a settlement is reached?

Your claim will be an asset of your estate and can be pursued by the executor of the estate.  Generally, a claim will survive the death of a person and will be able to be claimed by the personal representative of the estate.  I recommend that you have a will that names an independent executor.  You should discuss your estate with the person named as executor and give them the information that you may have regarding the claim so that they will know to continue to pursue it.