It's recommended every 15k... because we are all wheel drive, there is a lot more wear and tear on the front. I would get them done, just to avoid other problems. The way I see it, these are easy and from what I hear the cv's are hard, and I think this only keeps the cv's happy(er maybe, I'm not an expert on this). I would do it if I was you. Also, everyone says if you've ever dunked your front hubs.. like driven through some high water... then you need to get them repacked when you get back. The water gets into the hubs and messes with the bearings. Like this... LOL....