id be asking the dealer to show you the codes and the log file, they would have had to submit that for warranty. To me it sounds like they screwed up the first repair and they covered their butt on the second repair if they cannot show you the codes and log file.. I know we have to show log files for any trans work before warranty will move forward.
Also did not see the question answered as to what you were towing?
Also did not see the question answered as to what you were towing?