10 Speed trans.
 

Hi new guy here. I am leasing a 2021 f150 STX 5.0 crew cab 4 wheel drive with a 6' bed. When hauling my 17' camper I notice the transmission only shifts up to 8. I am in tow/haul mode and up and down hills. Is this normal?. I average 15+ mpg. Thanks for the help.