It depends on the amount of wear on the rotors. If they are grooved or pitted you will need to get them turned at a machine shop. Rotors have minimum thicknesses assigned by the engineers that designed them. So if they are too thin, or if turning them will make them too thin once they are flat, you will need to get new ones. To prevent a situation like this from happening make sure to get your pads changed when they require it. Usually they will start squealing from a small metal strip that comes off them designed for this purpose. If you let the pads go so long they start to grind against your rotors it's too late.
My brake job on my A4- rotors and pads- $473.
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You do not need a torque wrench when replacing brake pads and rotors. Some of the tools needed to change the rotors and pads are the c-clamp, sockets, wrench, grease, and brake cleaner.
When rotors need to be changed usually the pads have worn down. It is always a good idea to change pads when changing rotors.
depends on the condition od the pads. If worn or have groves etc from the rotors then replace.
If the rotors are in good condition, not warped, not scratched, then you can replace the pads without turning the rotors. Inspect the rotors carefully.
As long as your rotors are not warped, or you have not let the brake pads wear to the point they defaced the rotors, there is no need to change them. Just install new brake pads. Rotors can last the life of the car.
You do not need a scan tool to replace any brake pads. The wear is obvious.
The brake rotors are warped are out of round. Need to do a brake job and have the rotors turned are replaced. Be sure to install new pads and shoes.
I don't know if you are saying you have the new hubs and rotors and still have pulsation, or if you are asking what causes pulsation. If you have pulsation on slowing this is due to warped rotors, and you need to change the rotors and the brake pads, not the hubs. Not too expensive: 2 rotors and brake pads for my Pontiac is about 55 bucks. DIY of course.
To effectively stop disc brakes from squeaking, you can try cleaning the brake pads and rotors, adjusting the brake calipers, and using brake lubricant. If the squeaking persists, you may need to replace the brake pads or rotors.
According to customer reviews the best brake pads and rotors are EBC brake rotors and pads. They are manufactured in Britain and can be found at any auto store including Canadian Tire in Canada.