Vincent Vignola

Then add bigger heat sinks lol. GM did that with the updated l5p for the 2020 hd trucks. The fan on the new engines is much larger. The ford also got better mpg than the gmc because the l5p diesel had more load and wasn't in it's efficiency sweet spot as much. Having a quicker rear end brings the gears in the tranny closer together.

The main idea for me asking is for a gear splitting ratio. Tfl truck took a gmc 3500hd Denali crew cab up the ike with 30,000 lbs. They did the same with a similarly optioned f350. The ford had the powerstroke and a 10 speed auto, but it also had a 4.55 rear end iirc. The ford frankly performed much better than the gmc going up that hill, like 8 mins opposed to 11. The split speeds in a transfer case arent much more than a second transmission, and one can engage the low speed in 2wd if they wanted. I remember seeing 2lo on some transfer case designs, and this system wouldnt be much different than a semi trucks gear splitting box. The idea is to make the rear gear ratio much longer to keep the efficiency up for low load cruising, and in tow/haul mode the transer case would kick down into low and give a much quicker effective gear ratio.

Better than Ford. Better efficiency, more power, more trailering control. That kind of stuff. However, if you dont wanna answer the question then dont man. I'm not here to argue my point. I'm here for answers.

I wanted to keep it vague to protect my idea because I'm going to school for mechanical engineering and I have every intention of working at GM and giving them my overhaul plans for their trucks when I get there.

So a while ago I did a project for school on how to make a better towing rig than what GM already has, and I'm wondering one thing and it's hard to find: what's the crawling ratio for the 2-speed transfer case on the 2020 HDs? If anyone could help me out that would be fantastic!