Using the PERRIN Rear Shifter Bushings is straightforward. First, make sure your vehicle is a manual transmission and is on a flat, stable surface. Remove the old soft rubber bushing at the back of the shifter rod. Then, install the new PERRIN bushing in its place. The whole process should take about 30 minutes as estimated. As for maintenance, it doesn't need much. Periodically check the bushing for any signs of wear or damage. If you notice any issues, it's a good idea to replace the bushing right away. Also, keep in mind that this product is only for manual transmissions, so don't try to use it on an automatic one.