Jeep Grand Cherokee 2004 I have only two years and during all this time I have had problems with the tailgate. The shelves were old and didn't do their job well. Especially on cold days I had to support it with something. Then they stopped working completely and I was fed up. They got to my house quickly and installation was easy. My husband is a mechanic but I didn't want to wait for him and did everything myself in 20 minutes. Now my overhead door no longer stays upright, I just have to open it and it does the rest.