Quote:
Originally Posted by MikeW
Sorry to read about your driveshaft. Considering all the threads on here about transmission output shafts, and a couple on driveshafts, do you think launch control is the culprit???
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Wheel hop is the culprit. The bolts, which may not have been fully tight, as suggested by the slight ring of fatigue around the edge of the bolt, snapped under shock loading. Launch control was not designed for use on a sticker than normal street surface; it was designed to haze the tires by maintaining a rear tire speed slightly higher than the fronts, to in effect ride the line between all out spinning and bogging. When your road surface is sticker than the average street, as is the case with some of our warm concrete streets in Houston, or a VHT prepped track surface, you run a higher risk of wheel hop, however you launch the car. I have it on good authority - Launch control
should not break this car if used correctly.
In sum, don't use launch control on sticky surfaces, and make sure all your driveshaft bolts - front and rear - are tight. I would recommend 120-130 ft-lbs, even though dealer specs are 100.