Gear up = Gear down - Short firm brake if you have to gear down.
My preference has always been manually control the gears. Old school.
When going down hill and the speed increases to fast you have to gear down to the next gear. The engine has to hold your combination. Using to much breaking will increase heat on drums and pads.
Do not rush yourself even if others pass you.
2014 Ram 1500 CrewCab 4x4 5.7 Hemi 3.92 Rear and Air Lift 1000
2005 Jayco Jay Feather LGT - 29Y GVWR-7000 lbs.
Dexter Axle Lift 4-9/16" - installed with sub-frame.
Pro Series 1200 lbs. WDH with Double Sway Bar.
Champion 3100/2800 watt Inverter/Generator-Onboard Solar Power