I have a Tromm lg direct drive washer and when it is filling water it sound like a belt is slipping some of the time, any idea why
Your LG front loader has no belts. It is a direct drive motor. Check your supply lines, make sure there are no kinks and the valves are open all of the way. You could also have a bearing failing or a seal running dry. Locate the source (front, back, top or bottom) to have a better idea of what the issue is.