The abs test is a good lead. Let me explain: abs sensors speed measurements are used as input for engine and dsg gear changes. If an abs sensor is nicked you will have gear changing issues too. I did the test. You need vcds. Vcds reading of abs sensor will be interrupted at a certain speed, maybe around 10kl/h. But is you get the same reading on the four sensors bellow 10 km/h you’re good. I don’t think it’s your issue here but you never rule anything out until you confirm with a test.
In the comments section, there is a comment with five replies. The guy there solved the same problem after replacing the forks in the gearbox. Maybe in my gearbox the problematic fork is the 2-4, while these are the gears that I hear the noise when enabled.
Here is a nice schematic
Good find there. Just remember your dsg (the one on the bwa engine) is the dq250.
On mine there is a slight second to 1 clunk but it has always been there. The one I fixed in my thread is 3 to 2 sometimes. I will keep this fork solution in mind if ever I decide to open mine or take it to a shop.
Please le us know how it goes if you ever fix it. Thanks.