Your wrench example is bogus unless you add the fact that the 6 foot cheater pipe makes the whole assembly move, instead of breaking the bolt or the nut breaks loose and turns like it's supposed to. (in other words)
The truck moves and provides the torsion relief.
I bet I could break/ruin just about anything if I tried to, but in this case a guy's not trying to break the vehicle... he's trying to move it. If it's that glued to the spot then it's not the gearing's fault.
How many have you broken with 4 low in 2wd?
We've had company tucks with their front ends 6 feet up in the air before trying to pull obsolete "poured in place" cantilever signal foundations out or pulling up swelled-butt, line-poles up without digging so much. ;)
This dumb hammer mechanic has used cheater bars/pipes a lot longer than 6 foot before. :) I have combination wrenches with the open end cut off, so a pipe can be slipped over them- 1+7/16 (36mm) and
1+5/8" (41mm) and a 1+13/16" (46mm). For some reason never needed to do that to the 1+3/4" or the company owned 2+3/8". :)
"in theory, theory and practice are the same, in practice, they are not" -who is credited with that one? I just read it as a sig file :/
Alvin in AZ