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...
Check to see if the trans. cooler needs cleaning. I put TranSynd tranny fluid in mine - synthetic fluid. It can handle higher temps. The fluid is for an Allison transmission,
Look for a synthetic ATF+4 fluid - recommended by Dodge.
You will find it in many brands - here is one: TRANSMAX ATF+4® CASTROL TRANSMAX ATF+4® AUTOMATIC TRANSMISSION FLUID IS CERTIFIED FOR USE IN CHRYSLER VEHICLES. Full Synthetic formula exceeds ATF+3® requirements