Balls

220 isnt an issue after WOT racing the 420hp 6.2 it in the sand. 285F driving 75mph down the highway is! I had that happen with the 6 speed though, due to a bad trans thermostat. I would just check to see that your trans cooler lines are hot, mine were air temp when trans read 285F.

Had a 2019 Custom Trailboss until yesterday, with the 5.3/6 speed, good truck, really slow shifting trans, same trans that was in the 2016 LT which I also had, and hated. Dealer called and offered an upgrade to the 2020 LT Trailboss, 10 speed trans, for the same price (lease), so I jumped on it, love the trans!! Fast smooth shifts, no delay like that annoying 6 speed. Only problem I had was with the 2019, the trans thermostat got stuck closed so the trans would overheat, but they fixed it quick. No other problems. Absolutely love the 10 speed trans. I tried to get the 6.2L, but they didnt have any in stock.. so still have the 5.3, it's just ok. 10 speed makes it much better.

All you need to do is get spacers (bigger nuts) that make up the difference, use them as washers.