Holy crap. I had no idea people spin diesel engines so fast!!! I got my first powerstoke not long ago, and I have a cow it spinning 1900 going 55mph. I guess I am used to big trucks, with 1800 ceiling rpm. When the thing shifts at 2400, i always cringe.

While on topic, kind of, do all of these truck tuners that adjust shift RPM just adjust for full throttle shift points, or do they lower part throttle shift points as well, also I would like the ability to lock out the downshift from over drive to 4th (E4OD) over 45 MPH (I tow a lot), unless I manually (shift lever button) call for a downshift. Is this possible??