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...
If You have a problem at slower speeds get a big cooler with electric fan. This will help when not enough air is flowing thru the grill. You can also overheat a Trans quickly backing into an uphill site or a long backup situation. No air is flowing thru the grill and trans TC is unlocked. Having a Gauge will help you decide if any changes are needed over what you have in place.