Leaf Spring upgrade causes a braking problem?

So I got the TSB Leaf Spring upgrade and I have noticed that now whenever I apply the brakes, the truck shudders and vibrates.
It is difficult to explain but it is definitely not the normal and smooth braking process. My truck definitely did not do that before and I really hope that it has something to do with the leaf springs needing to “settle.” Anyways I was just wondering if anyone else experienced this.

For the record my tuck definitely needed the TSB upgrade, I did not have it done just for the hell of it. When I would load my truck up to go dirt biking my headlights would shoot up into the air and my truck would bottom out just from backing out of the driveway. Also when I took my truck in I did not have new brakes or tires installed, just the TSB and an oil change, so the vibrations can not be a cause of having brakes being incorrectly installed or something like that.

 

When i went in a few weeks ago for my LS TSB, the dealer told me my truck qualified for a brake TSB. They turned the rotor and gave me new pads.