1. Improper Installation: Ensure that the new hubs and rotors are installed correctly, following the manufacturer's guidelines. Pay attention to proper torque specifications for lug nuts and hub components.
2. Rotor Compatibility: Confirm that the new rotors are compatible with your vehicle's specific make, model, and year. Mismatched rotors can cause pulsation due to differences in design or tolerances.
3. Rotor Warping: Check for rotor warping by visually inspecting them. If a rotor is warped, it will have a wavy surface that can cause pulsation during braking. Replace warped rotors.
4. Lug Nut Tightening: Make sure that the lug nuts are tightened evenly to ensure balanced rotation of the wheel and rotor.
5. Brake Pad Seating: New brake pads need time to seat properly against the new rotors. It may take a few hundred miles for the pads and rotors to adapt, which can cause temporary pulsation.
6. Suspension Issues: Worn or damaged suspension components, such as control arms, bushings, or ball joints, can contribute to brake pulsation. Inspect and replace these components if necessary.
7. Wheel Alignment: Misaligned wheels can affect the proper engagement of the rotors and pads. Check the wheel alignment and adjust as needed.
If pulsation persists after considering the above factors and taking corrective measures, it's recommended to consult with a qualified mechanic or brake specialist for further diagnosis and repair.