[Van]

Well...if you're going to launch it, probably best to do it "by-foot" from now on. At least until GM sorts things out. The power doesn't get dumped into the drivetrain and you can launch at a lower RPM.

Then again, why would you be launching at 4500rpm anyplace but the dragstrip ? (The occasional "spirited take-offs" from time to time are understandable but probably not at 4500rpm)?.

FWIW -- the EVO IX's are also known to burn clutches and bust t-cases on the strip. It was engineered so that the folks doing that crap all the time would have to replace clutches (being less expensive than trannies and t-cases). However with the higher HP numbers sometimes the other stuff still goes. Most owners have accepted the fact now that you gotta be prepared to pay if you wanna play.

Regardless of whether or not GM put the "feature" in...its still hard on the vehicle and could in fact be labeled as "abuse". It WILL make the parts break prematurely and that's to be expected. Once however is a problem unless you're pushing through a higher amount of power than the shaft was engineered to take.

So is the culprit still a metallurgy problem? Or has anything else surfaced from an engineering standpoint? What's the output shafts torque rating? Anyone know that?