cv axle replacement on my chevy volt?

hello. I am replacing both of my cv axles on my chevy volt. I have both axles already from GM, and I also got the washers and axle nuts. I want to know if thats all I need to complete the job, or do I need any other parts, like retaining clips or transmission seal that I need to replace also. Ive tried to look for the info online, but I cant find any certain answers. Thats all I need to start the replacement job. Thank you