You could do a gear swap and that will help. It will also take your gas mileage down.
Question: when you are pulling a grade and in second gear and topping out at 40 MPH, are you starting to overheat? If you have a transmission temp reading, is that getting too hot?
If the answer is "NO" then don't worry about it. Top the hill at 40. There is a stigma in the world today that we must get to the top and not hold up traffic. Just because the speed limit is 55 or 65 or what have you. This doesn't mean you can't go slower up the hill. As for holding up traffic, relax, pull to the right as much as you can, use turn outs whenever possible and enjoy the drive.
If the answer is "yes", then a gear swap may keep you from overheating and it may not.
Probably not the answer you were looking for. Apologies. If you look at my signature you will notice, the combination I am towing and towing with. Even I slow down on grades. I have found myself dropping to 3rd gear and hovering between 45 and 50 MPH on grades. Many times, I can really push it and maintain 55 - 60 MPH, but then I am shifting from 3rd to 4th, and playing the speed drop off shift down, speed back up game. I refuse to do so anymore. I do just as I have suggested, I let the speed drop off and sit in a gear the truck is comfortable towing at and relax. I don't overheat my engine, tranny, clutch or overwork the truck.
2015 White Hawk 25BHS Glacier Package
2004 Dodge Ram 2500, 5.7 Hemi, 5Spd Manual
2008 Arctic Cat M1000 SnoPro
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