D100 + 440 + 727 + 3.91 = tire spinning. Oops!

It's not theory. It's fact. 3.23 will spin the tires much faster and harder than 3.91.

I agree faster but, the 3.23 will require more torque and throttle to do so. I’m suggesting that the 3.23 won’t be as easy to get it spinning. I went from 3.55 to 4.56 in my other truck and slightest throttle would make 4.56 spin. With the 3.55 I really had to get into it to spin tires. If what you’re thinking with the 440 it may not matter.....it’s going to spin, you’re correct.