What is the proper procedure to follow when you are towing up a mountain highway in tow/haul and the trans temp starts to climb up to where you are getting concerned about it i.e. 230. I have a 2005 D...
On my 2500 Dodge Diesel, when in 3rd gear with the torque converter not locked up the temperature rises to 200-205 degrees. If the TC is locked it never gets over 180 degrees.
This is towing a 10,000# trailer
I wasn't aware that the "tow" mode kept the TC locked in lower gears......Good to know!