Multiple drop downs synced needed by Jim Benham

I have a website that is using the clean themes Symmetry at Padholdr.com If you select Autos, then Dash mounts you will come to a page that has 3 variations. Choose make, model, and year of vehicle. Currently when you select Make it will sort the year and model category correctly, however it won't sort them one step further. What I'm saying is that I would like my products to be able to sort by Year, then Make, then Model so by the time you get to model it is only showing you what is available for that year and make. Is there anyone that can do this for me?
Thanks
Jim