I would say 100K of hard driving with a bigger turbo, chip, injectors etc is a long life for an O1M. Given most O1M's last 100-150K under normal driving conditions.That's 100k hard wheel spinning miles with many miles driven to the maximum indicated speed of 120 mph. I have cruised over 100 mph for ~3 hours or so and for shorter durations as well... all on off-road closed race courses of course.
So I guess Oilhammer would tell me that Amsoil non-VW wrong transmission fluid has done me in? Live and learn I suppose.
In any case CoolAirVW, would you like to take a crack at the VB to see if that will buy me some more time despite my insistence on using the wrong transmission oil?
When you started Amsoil ATF your transmission was already failing with the shifts and bits in the filter/pan. So regular changes, Amsoil ATF and "normal" driving, I would expect an O1M that has not started failing to last well into the 200-300K mile range.
Thanks for being honest with your usage of the car and what maintenance schedule you had it on with the Amsoil ATF.