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 ...
20k is just looking at the turbo gauge on my instrument panel. It shows the rpms as they rise and fall, certainly not the same as my Silver Leaf I was used to with my 370 ISL. Perhaps it was the fan as well. Just an unusual noise to me but not alarming. I figured there are lots of folks here who are way more familiar with this rig than me.