my 04 lly had same lights on on dash and message on dash and needed new guage cluster I had no trans issues when this happened. replaced guage cluster and all good.
Fresh engine in my truck and noticed upper radiator hose is crushed (vacuum on cooling system) when I go out and check the oil before I leave in the AM engine not running and cold. Never noticed this before. Should the radiator cap allow air into system when cooling off.