Metal shavings and chunks in differential

[arazdolgin]

So fixed my front differential. D46-170 with 4.10 rears cost me 7k from Drivetrain in Chicago, pretty expensive, plus labor.

The repair guys from Drivetrain said: “ We found out the input and power divider components where worn out, and the ring and pinion started to pit.
Something also ran through the pinion drive gear.” Is that means I used diff lock and broke it? I did it once with heavy stuff with side curb.

This particular front differential was installed in 2020. I am heavy haul guy.

So my question is do i need to upgrade info in ECM if my original rears was 3.78, but I changed to 4.10 rears?

How to ensure the engine torque and speed governor is not rated/set higher than the diffs continuous use duty-cycle ratings (and not its peak ratings)??

Any opinion will be great as I don’t want to stuck in again, thank you