Am I Crazy for Considering this 18 Dually

[AH64ID]

My Aisin in TH shifts at set speeds that are like 45 to 4th, 55 to 5th, 65 to 6th gear.

As does mine, unless I'm into it a little heavier.

That chart is based on holding the shift to 2500 to show the rpm step down, that's it... it's not a normally occurring shift chart.

 

[Cummins12V98]

I only drop 250-300 RPM when up shifting.