From looking at the photo, my physical analysis is that ...
It has to do with leverage = distance from the center of mass.
the closely spaced attachment on the main chassis cannot prevent the rear pod from moving as effectively as in the case where the attachments are farther apart from each other on the main chassis.
If a friend of yours was holding a wheel end of the wheel barrow and you were holding the handle bars and tried twisting against each other, you would have a big advantage.
Therefore, the main chassis won't have as much command over the rear pod. It will have to let it be. And the rear pod will have more traction.
By the same principle, if the pitch shock attachment on the rear pod is raised, the rear of the car will be calmer.
Last edited by edhchoe; 09-17-2013 at 12:06 PM.