I'm sorry to hijack this thread but I figure if anyone knows the answer to my question it's the people here: I'm getting a weird intermittent sucking sound from the frontish area of my DCT.
Bought the car used and the DCT pan was pretty wet so I knew it was due for a service ASAP. Only drained about 4L of fluid from the pan. Did both filters, new pan, and gasket. Took ~6.5L of fluid after oil balancing with ISTA.
Basically immediately it started making a weird intermittent sucking noise. It sounds like a pump ramping up and down every 4ish seconds.
Google led me to this thread and I thought I had my smoking gun. Dropped the pan again and sure enough, the ball in pump had flipped 180 deg. New one in, oil balance again, and the noise persists.
Here is a video of the noise.
In person it sounds more like fluid sucking past a flapping seal or something rather than metal on metal like it kinda does in the video.
I've searched around but couldn't find anyone with an intermittent noise like this.
Thank you!