Almost two years ago, I replaced the transmission input speed sensor in my 2008 Astra because it was leaking transmission fluid (the o-ring was bad), and the car had some erratic shifting. Recently, I began noticing some erratic shifting again, especially when going down hills. When I changed my oil the other day, I inspected the sensor I had installed, and noticed that it was leaking. Sigh. So, I ordered a new one (better quality, I hope). This is the video of me replacing it. Again.