Except for the gravity load that the below author is talking about is probably 100x less than the load causing the gears to separate. I'm pretty sure that case flex and shock loads are what ruin the 5 MT.
Shock loads are VERY high when you drop the clutch and/or flat foot.
Quote:
Originally Posted by 100_Percent_Juice
I have also done a ton of reading on the subject and it makes total sense that its the shock load that eats gears not how much power your car has. My car had almost 60k on it before I bought it so I really can't say how it was driven. Since I have an 04 it says my car came with the thicker RA width gear set so it should be stronger than the 02-03 trans. If I had to do it all over again I would have waited longer and saved more money to get a low mileage sti or a new wrx. I think its MY06+wrx not the 05 that got the 2.5l and the 6% load increase because of the new 3.70 final drive.
I read this about case flex:
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