I got a 14 Silverado, fresh fluid flush new filter new gasket bypassed thermal valve on the side of the trans so it always flows open. Constantly shifting it can’t seem to decide what gear it’s in. Also it will not stay below 200 F I’m not towing anything the bed is empty it’ll hit 200 on a cool 70 degree day and it’s not even stop and go traffic please help. I’m at the end of my rope. ………… flushed the trans cooler it’s still climbing in heat any other ideas ?