I drove an Allison 10 speed autoshift, select drive by push button (on this truck) let out the clutch and apply half throttle and leave it as it shifts up. As you decelerate it downshifts and you put the clutch in when you stop. That easy.
I am sure someone else may have something to add.
2003 28' Show Hauler Motorhome on a 1995 FL 120
www.showhauler.com