[SoFlaZ]

Originally Posted by rayhawk

Ok, I am doing a bit of speculation here, but as I understand it axle hop is due to resonance in the system. That is why it shows up more pronounced at a particular rpm. Obviously, it is a complex system that involves rotating tires, flexibility in the suspension and the car, etc. It is not quite as simple as a resonant frequency of a string, as there are many degrees of freedom to a car's suspension. However, with that said, it appears the reason for the different size shafts is intended to shift or minimize the natural resonant frequency of the suspension as a whole without adding excessive mass to the structure. Two different diameter shafts will have a different resonant frequency, so even if on their own they would be prone to some inherent vibration, the fact that they "ring" at a different freq. means they no longer combine to magnify the problem into noticeable or damaging wheel hop.

I would love some more technical data on this system but my guess is that most of their engineering data is not going to be released, as I believe they have patents on the design (although Chrysler uses it in the Challenger as well-I don't know how that works).

By the way, thanks for the info fbodfather, it sounds like you guys have done a lot of work on this.

+1