Been having this problem consistantly, the whole dash shakes when i apply the brakes, and have already gone the obvious routes of changing brakes and rotars many times and nothing seems to remedy the problem. Please let me know if there are any suggestions on how to get me running smooth again. The problem gets worse going down hill at 40-50mph Please help!!!
parts replaced:
rotars
calipers
front hubs both sides
CV shafts
hydro booster
brake lines
steering box
pitman arm
idler arm
tie rods

 

not to insult your intelligence, but have you been breaking in your pads and rotors. most of the time, warped rotors will cause violent shaking or pedal pulsation.

 

Is the problem ONLY when you brake?
What if you gun it from a dead stop, does it vibrate then too?

 

I've had similar symptoms with out of balance tires and also with a seized U-joint. I had to take the drive shaft out completely to tell, no way to know for sure with it in the truck.

 

I replaced my universal joints when I fit my tranny back up in.
Don't forget to lube them. There is a nipple sticking out on them for it.

Do this: with the wheel off, grab the rotor and see if there is any play.
It should remain firm. Then take off your brake caliper allen screws
And closely inspect the threads to make sure the threads not stripped.
It is common for the threads to loosen up in these and you will need to go
To an auto parts store and buy a rethreader bolt. If you caliper is loose due to
Bad threads maybe that is what's causing it.

 

could be balljoints.. my dads truck shook like hell with a bad balljoint.. only when braking

 

Probably bad tie rods x 4.