After completing some small trips, I got to wondering what should I do with the auto transmission. I have never towed a heavy load with an auto before. In my TD5 Defender, I did not use 5th gear when towing unless going down a slight grade, and there was no stress on the transmission. Do people use manual mode, and not cruise in 8th? Want to preserve this transmission, and the vehicle for a long time. I do plan on using manual mode for steep downhill grades, to preserve the brakes, even with a braked trailer.
