The 3 top causes were the bellow tub seal and 2 clamps. I chose to replace all 3. Everything went well using the superb how to videos. The only issue I had was that my control console had a separate piece to remove that was not shown in any videos I looked up. But my machine is very old. That slowed me down and added an extra hour as I did not want to force or break anything. Washes well and no leaks now!!!