If that’s what you read that’s a YOU issue.
Take a look at every Borg Warner T-10, Super T-10, Saginaw and Muncie out there. They are ALL aluminum cases. Do they fail? Yes. And mostly it’s because the clutch kills the gear box.
Its pretty easy to explode any gear box when you run a junk clutch, which BTW those are rated by HP too.
I’ll say it again. Trying to determine if a gear box is strong enough for the application using HP or torque as a measure is a fools errand.
I can take any transmission you pick thats rated for let’s say 500 HP and shred it with 300 HP. I can also take that same gear box and run 750 through it and not kill if IF the clutch is correct.
You, like others (put on your big boy pants and don’t be offended) look for an easy answer to your question when there isn’t one.
You are starting with a false premise and building your dogma on it.
You need to learn clutches and clutch tuning and THEN figure out what the gear box will take.
At a bare assed minimum you need a clutch tamer to make the gear box live.
Again, you can break any transmission with much less power than it’s rated for. That rating system is a dumbed down, inaccurate method used by companies to seek you their garbage without teaching you anything.
Of course, when their junk destroys your gearbox, the clutch morons will tell you the gear box was junk.
BTDT.
