2018 chevy silverado 1500 with less then 110,000 miles on it. Truck gets up to around 33 mph then goes into neutral. Once it slows down to around 25 it'll let me speed back up to 33 then back to neutral. Thought it was my rear speed sensor. Got it replaced and it's still doing it. Any ideas? From the research I've done everything is pointing to the transmission is going out of it. Any help would be appreciated.