See detailed instructions here... http://www.autoclinix.com/Mercury/Brakes.html
Check your antilock brake system, and rotors may be warped
remove stud locks
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.
Could be the tires, or your front brake rotors
depends on the condition od the pads. If worn or have groves etc from the rotors then replace.
With the front end jacked up and on supports, remove the wheel, remove the calipers, then just pull off the rotor and replace. It is good to replace the disc pads also.
Replacing brake rotors on a Chrysler Pacifica will vary in price depend on the labor cost. The price should be around $150 dollars.
The majority of the stopping power is performed by the front rotors. I would start by replacing them.
They are on the inside of the rear rotors. Once the caliper is removed, remove the rotor. Sometimes a good 5lb hammer might help if they are stuck. The pads are inside.