Please purchase a printed (paper) or a repair manual on CD so you can insure that you do the job correctly. Repair manuals can often be purchased new or used at book stores or on line. You can often get copies of just the pages of a manual you need at a local library for a small fee for every page copied. Call and ask.
Different vehicles have different procedures for changing pads and rotors, though they are often similar. Basically, the wheels are pulled after jacking the vehicle up and supporting it safely on stands of some kind. The brake calipers are then loosened and swung out of the way of the rotor, or removed alltogether, depending on the vehicle.
With the calipers "open" after disassembly, the old pads are removed and the pistons in the calipers are compressed (pushed back in) to allow for the installation of the new pads. The rotors are removed and then either turned or replaced, with an auto machine shop or the like doing the turning of the rotors. If your rotors are too worn and thin to be turned, they'll tell you. Put the brake assemblies back they way they belong and you're pretty much done. Some folks like to bleed the brakes after doing a brake job. It may or may not be "necessary" to do this, but some experience is needed to make the determination.
The description of the process here is abbreviated. It cannot be specific, and it is not designed in any way to allow you to attempt something you are not comfortable with. If you have to ask the question, it may very well be that you lack the requisite skills and knowledge to attempt this yourself. Remember that your life and the lives of others may (will!) depend on your getting your brakes fixed correctly, whether you do it yourself or have professionals do the job. You've been warned. Please be smart about this and make the best decision.
Ans 2 - The first responder has many good points - and he's right in not being too specific, as you didn't tell us make, model or year. -All cars are NOT the same ! - If you want correct technical answers, then please give us ALL the facts !
When rotors need to be changed usually the pads have worn down. It is always a good idea to change pads when changing rotors.
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.
Replace the pads, and the rotors. You need to change the brake pads and the rotors.
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.
worn pads change your brake pads and get your rotors machined while your at it
I went to a local shop today and they charged me $306 just to replace my FRONT brake pads and rotors
Its a good idea to change the pads because the old ones may have worn unevenly. That may cause future damage to the braking system. If you just need to get by then its ok to used the old pads but most of the time the rotors cost more then the brake pads. I WOULD CHANGE THE PADS.
To change the brake rotors on a 1991 Honda Civic raise the vehicle. Remove the wheels and brake caliper bracket. Remove the brake pads. Loosen the rotor mounting screws and replace the rotors.
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.
Check out this post: http://www.mavromatic.com/2007/03/diy-part-i-replacing-rear-rotors-and-brake-pads-on-a-land-rover-discovery-ii/
Check front pads and brake rotors. You might have to change the pads.
You will need to remove the tire and wheel from your 2005 Dodge Durango. Remove the brake pad Springs and calipers. Tap the rotors with a hammer to loosen them. Slide the rotors off. Reverse the process to install the new rotors and brake pads.