All the heavy duty drives had a pin.
Part of that is because back in the day guys were running 50 grade oils that were as thick as clay.
The load on the drive was incredible especially on cold starts. I know Chrysler always said to use a 50 grade oil with any tunnel ram deal.
Today I run 0w20.
That being said, I have broken enough stuff that I just build more margin in than needed.
I’m that kind of chicken