Ford Repair: Ford Aer0. brake problem, cv joint, runout

Question
My well kept Ford Aero. 88 recently have a problem when braking at speed 40-55mph,especially when go down hill, the car's front end become shaking and vibrating so bad, I've replaced new disk,brake pad,cv joint but no help.
do you have any susgestion.
Thank you very much.
Khanh  

Answer
Hello and thanks for the question...I'll try to help.
Since the problem is only when braking.....I would still look in to the front rotors........even though they are new. Remember NEW does not mean good. If the wheels were over torqued when putting the wheel back on.....it could have warped them again. Put a dial micrometer on them to find out. The MAX runout should be no more than .003"
Hope this helps,
Erik