Front end vibration during breaking

so i get this vibration at the front from low speed driving (40km/h-60km/h) and high speed driving when i brake. I just changed over to Si/Ex spindles and i changed brake pad and rotors , put on new inner and outter tie rods and got an alignment done , and also got new tires and balanced done and made sure that the wheel bearings are still good and they were . So i dont see how im getting a vibration . I changed a axle on the passenger side and its was a bad axle but was only supposed to be on for temp use is it possible that that might be the problem and causing the vibration ? if you know anything text me (+1 (519) 991-3660) or just answer here thanks!