[MEvang]

Well you are all on to the cause of this. This is a fundamental engineering problem with trucks and common on many brands. As with many problems like this there are many things going on to cause the problem. Rear shoes can become more aggressive or"sticky".
When the rear axle "wraps" during a stop, as soon as you let up on the pressure the axle will snap back and you feel it. If the drive shaft slider is sticky you feel it more. If the shoes don't slide loose and abruptly let go, you feel it more.
Rear brake shoes last on these truck not only because of the proportioning of the brake system but because of the material formulation of the shoes. Just like brake pads, ceramic and metallic formulations have made shoes last a long time. The dust from these shoes can also contribute to the shoes becoming more aggressive "sticky". I suggest a good cleaning, and a light sanding of the shoes and drum surface when you adjust the brakes, at lest once to twice a year. This will help the shoes slide lose from the drum instead of breaking loose aggressively.
This year Dodge has fixed this problem on their light duty trucks. They have gone to coil spring rear suspension. No more spring wrapping. Now these truck can no longer carry the load a leaf spring truck can, but comfort will be much better.
Keep you shoes cleaned and adjusted and the slider lubed and this problem is very minimized.
Mike