Using your Perrin Rear Shifter Bushing is a breeze. First, make sure your vehicle is in park and the engine is off. Then, follow the installation guide that comes with the product. It should take about 30 minutes to install. Just replace the soft rubber bushing on the back of the shifter rod with this stiffer Perrin bushing. When it comes to maintenance, there's not much you need to do. Check the bushing regularly for any signs of wear or damage. If you notice any issues, replace it right away. Remember, this bushing is for manual transmissions only, so don't try to use it in an automatic vehicle. Enjoy a smoother and more connected shifting experience with your new Perrin Rear Shifter Bushing.