Warped brake rotors since new.
Pinion seal in rear-end replaced.
Rotors have been warped since new and 75% of the cars sold in 1998 have this problem. Unless you want to replace with aftermarket rotors at your own expense, steer clear of 1997-2000 Camaro's.
I have never had that kind of luck with my rotors for one. Two, rotors aren't really considered that expensive if you're changing that often with stock rotors anyways, so it would be saving money in the long run to buy aftermarket rotors. And three, the only time that I have ever warped my rotors, is when my rear brake pads wore down to nothing and the calipers were the only thing grabbing the rotors. And I can't say that you should hate everything from Chevy, and everything in your car just because you have the continuous rotor issue.