I own a 2000 F150 Harley Davidson 2wd with the 5.4 and it seems that when I apply the brakes while going 30+ mph, it violently shakes the more I brake. I've heard this can be a common issue. I've replaced the rotors, calipers, pads, and anything to do with brakes in the front. Wheels are lined properly. Switched to slotted and drilled EBC brakes with "yellow stuff" pads. I was hoping if anyone had the same issues and has suggestions or knows how to fix this issue. Thank you.

 

When exactly in the process did it start shaking, before, during or after the new rotors, calipers, etc were replaced.

Check the front suspension/steering components, ball joints, tie rod ends, pitman arm, idler arm, and sway bar bushings.

 

It's been going on before and after brakes were replaced. I'll check all of that!

 

Could it be the ABS kicking in? Pull the ABS fuse and see if it still does it.

 

Another cause of this is uneven and or over torqueing the wheels.
It can warp the discs and wheels out of shape.
Then the disc has a wave in it that when passing through the caliper pads causes friction and attempts to turn the wheel direction until the wave leaves the pad area then it just keep repeating.
It can also show up as heat sensitive due to the disc changing shape from heat changes.
Remove all front Lug nuts, rotate the wheel few positions then 'evenly' torque to spec.
Not guaranteed to fully correct the issue once it has happened but should see a change to prove the cause.
Only way is to replace the discs again and not over torque the wheels.
Let us know if you see this effect.
Good luck.