GM Silverada Beats F250 In Frame Twist Test

ktosv wrote:
Spoon, your understanding of fatigue is flawed .

Therefore, your statement about engineers allowing for flex to prevent failure (from fatigue) is flawed. They may allow for this flex, but they better be accounting for the fatigue life based on the deflection and cycling.

You sound much more knowledgeable that I am, so I defer to you. My understanding of the exact science behind it is flawed, but the end result appears to be the same. These frames were designed to handle the stress and still have a long service life.

This "test" doesn't make GM's frames any better than Ford... it simply means that it doesn't twist as much.