When I break heavily on track days, for example at the end of a long straight, my back end wiggles to the left and right (I.e oscillates laterally, but not periodically). Would like help diagnosing why and how to solve this. My initial thinking is this is caused by better brakes in the front than the rear... and the stopping force is so unbalanced and the rear so light/unloaded that the slightest steering wheel movement or uneven pavement rotates the back end. The tires catch and straighten the back end before it rotates too far in one direction. Anybody have other ideas or is this the cause? Would better rear brakes help?