Just pulled a tough hill, towing my about 17k 5ver, pushing it hard to get past a wide load truck and the turbo went to about 20,000 or so... pretty loud wind up noise that is new to me. Wondered if ...
I think I heard something like that on one of the TFL road tests. They had the Ram loaded up & went charging up the hill. Cant remember which one it was though , the guys on board were wondering what it was too.