About the 7.5" axle

I'm getting tired of looking for a reasonable 8.8" axle and finding
$1000 deals on what appear to be unknown crap. For $1400 I can get a
brand spankin new one.

I'm reading that the 7.5 is good up to 400 hp. Well, that does seem like
a lot of horse power, something my v6 will never put out.

I'm looking for 3.73 gears and I'm willing to put in an 8.8" axle. I'm
always being told that I'm likely to break my 7.5" if I put in 3.73
gears.

So after that blurb, assuming I put in 3.73 gears, my question is, what
breaks on the 7.5" axle? The gears? The axle shafts? The pumpkin? What
is the weak link?

I've found nothing on the web on this. All I see is a lot of "I've see a
ton of 7.5's broken..." and such. Lot's of talk, no examples.

I have a 2009 v6 vert, auto trans, GT exhaust take-offs, cold air
intake, and an SCT tune. That's probably the end of power train mods for
me. If I wish real hard I might be getting 240 hp. Will I break mine if
I stomp on it now and then with 3.73's?

Thanks for reading.

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