Are those pins and how do they come out. never seen pad system like that.

Pacifica 2006-2008
Brake Calipers

• REMOVAL & INSTALLATION

Print I hope this helps,Good luck

Removal & Installation


NOTE Using a brake pedal holding tool, depress the brake pedal past its first inch of travel and hold it in this position. This will isolate the master cylinder from the hydraulic brake system and will not allow brake fluid to drain out of the reservoir while the brake lines are open.

1. Before servicing the vehicle, refer to the Precautions section.
2. Remove or disconnect the following:
   
   Negative battery cable Rear wheels Banjo bolt retaining the brake hose to the caliper. Be sure to plug the end of the brake hose or cover it with a plastic bag to prevent contamination from entering the hydraulic system. Caliper guide pin bolts Caliper assembly from the brake adapter by rotating the bottom of the caliper away from the rotor, then lift the caliper with the pads away from the adapter abutment Brake pads by pushing (outboard) or pulling (inboard) from the caliper fingers and piston
   
   

   Fig. Brake hose banjo fitting (1), caliper guide pin bolt (2), caliper adapter (3), caliper (4), copper seal washers (5) and banjo bolt (6)
   
   

To install:

1. Completely compress the caliper piston
2. Install or connect the following:
   NOTE The outboard pads are side oriented, make sure the spring clip is installed so it is positioned downwards when the caliper is installed.
   
   
   Inboard pad clip against the piston cavity and press the pad until the clip is seated making sure the pad backing plate is flush against the piston
   
   
   Outboard pad making sure the locating pins are positioned against the ramps. Slide the pad onto the caliper and ensure the locating pins are squarely seated into the holes on the caliper and the pad is flush against the caliper fingers.
   
3. Make sure the abutment shims are in place on both slide abutments.
4. Retract the caliper guide pins to clear the caliper adapter bosses.
   
   Brake caliper. Staring with the upper end, position the caliper and shoes over the rotor and align the outboard pad upper edge with the caliper slide abutment. Rotate the lower end of the caliper into position Caliper guide pin bolts and tighten to 200 inch lbs. (23 Nm) Banjo bolt with new washers on each side of the hose fitting and tighten to 35 ft. lbs. (47 Nm) Wheels Negative battery cable
   
5. Bleed the brake system and road test the vehicle

Normally it is just the Torx head bolts that need to be removed in order to replace the pads, but I have seen them so badly rusted that I have had to torch them out, and replace with new Torx slider pins and caliper bushings. The cause is lack of service. Those pins need to be removed periodically to be cleaned, re-lubricated, and re-installed to prevent seizing.

Brake Pads Removal & Installation Front

To Remove:

1. Drain brake fluid to ½ full level in reservoir.
2. Remove the front wheels.
   
   
3. Remove the front brake caliper assembly.
4. Remove the 2 anti-squeal shims from each of the 2 brake pads.
5. Remove the wear indicator from each of the 2 brake pads.

To Install:
NOTE: When replacing worn pads, the anti-squeal shims must be replaced together with the pads.

1. Using a large C clamp or equivalent press piston into the caliper.
2. Apply disc brake grease to the inside of each anti-squeal shim.
3. Install the anti-squeal shims on each pad.
4. Install the pad wear indicator clip to the pads.
5. Install the pads with the pad wear indicator plate facing upward.
6. Install the brake caliper with the 2 mounting bolts. Torque the bolts 25 ft-lb (34 Nm).
7. Install the front wheels.
8. Fill the master cylinder with new clean brake fluid.
9. Pump the brake pedal several times to seat the brake pads.

Rear TMC made rear brake components

TMMK made rear brake components

To Remove:

1. Drain the brake fluid to ½ full level in reservoir.
2. Remove the rear wheels.
3. Remove the caliper slide pins.
4. Remove the caliper slide pin bushings (TMMK made) (Kentucky).
5. Remove the rear brake calipers.
6. Remove the 2 brake pads with the anti-squeal shims.
7. Remove the anti-squeal shims and pad wear indicators from brake pads.

To Install:

1. Using a large C clamp or equivalent press the piston into the caliper.
2. Coat both sides of the outer anti-squeal shim with pad grease.
3. Install anti-squeal shims to each pad.
4. Install wear indicators on the 2 brake pads.
5. Install the caliper slide pin bushings (TMMK made) (Kentucky).
6. Install the rear brake caliper with the slide pins. Torque the slide pins as follows:
   • TMC made (Japan): Torque the caliper slide pin 25 ft-lb (34.3 Nm)
   • TMMK made (Kentucky): Torque the caliper slide pin 34 ft-lb (47 Nm)
7. Fill the master cylinder with new clean brake fluid.
8. Pump the brake pedal several times to seat the brake pads.
9. Install the rear wheels.

Brake Rotor Removal & Installation Front To Remove:

1. Remove the front wheels.
2. Remove the front brake caliper assembly.
3. Remove the front brake pads.
4. Remove the 2 bolts and caliper mounting bracket.
5. Place match marks on the disc and axle hub.
6. Remove the front wheel disc.

To Install:

1. Align the match marks and install the front disc.
2. Install the brake caliper mounting bracket. Torque the bolts 79 ft-lb (107 Nm).
3. Install the brake caliper. Torque the bolts 25 ft-lb (34 Nm).
4. Install new gaskets and connect the brake hose to the caliper with the banjo fitting bolt. Torque the fitting bolt 22 ft-lb (29.4 Nm).
5. Fill the reservoir with brake fluid.
6. Bleed the brake system.
7. Install the front wheel.

Rear To Remove:

1. Remove the rear wheels.
2. Remove the brake caliper assembly.
3. Remove the brake pads.
4. Remove the 2 bolts and the caliper mounting bracket.
5. Place match marks on the disc and axle hub.
6. Remove the rear disc.

To Install:

1. Align the match marks and install the rear disc.
2. Install the rear brake caliper mounting bracket. Torque the bracket bolts as follows:
   • TMC made (Japan): Torque the bracket bolt 46 ft-lb (61.8 Nm)
   • TMMK made (Kentucky): Torque the bracket bolt 34 ft-lb (47 Nm)
3. Install the rear brake caliper with the slide pins. Torque the slide pins as follows:
   • TMC made (Japan): Torque the caliper slide pin 25 ft-lb (34.3 Nm)
   • TMMK made (Kentucky): Torque the caliper slide pin 32 ft-lb (43 Nm)
4. Install new gaskets and connect the brake hose to the caliper with the banjo fitting bolt. Torque the fitting bolt 22 ft-lb (29.4 Nm).
5. Fill the reservoir with brake fluid.
6. Bleed the brake system.
7. Install the rear wheel

A few things it could be. Cheapest is to flush your brake fluid out with new fluid. This alone has solved many soft brake problems with TB's. You also could have air in the line, but flushing the system out would take care of this. Could have a pin hold in the diaphram on the brake booster. Another problem I've seen is a bad ABS sensor.

I believe that the rear discs are warped or the tires are out of round when braking. More likely, the discs. --- The following are the instructions for replacing the front and rear pads for the front/back rotors. 1999-01 Grand Cherokee Front

1. Drain 2?3 of the brake fluid from the front reservoir. Use the bleeder screw at the front outlet port to drain the fluid. If equipped with anti-lock brakes, relieve the system pressure.
2. Raise and safely support the vehicle.
3. Remove the wheels.
4. Insert a small prybar through the caliper opening and pry the caliper (using the outboard brake pad) to bottom the pistons in the caliper bore. NOTE: This will back the brake pads off of the rotor surface to facilitate the removal and installation of the caliper assembly.
   
5. Pry the caliper support spring out of the caliper.
6. Remove both caliper slide pin bushing caps and slide pins.
7. Lift the caliper from the anchor.
8. Using a piece of mechanics wire, support the caliper so there is not tension on the brake hose.
9. Remove the brake pads from the caliper. Fig. 2: Installing the inward brake pad on the front caliper pistons - 1999-01 Grand Cherokee
   To install:
   
10. Position the brake pads onto the caliper.
11. Position the caliper into place on the anchor.
12. Coat the caliper slide pins with silicone grease and torque them to 21-30 ft. lbs. (29-41 Nm). Install the slide pin bushing caps.
13. Install the caliper support spring in the top of the caliper under the anchor; then, install the other end into the lower caliper hole. NOTE: Hold the spring in the caliper hole with your thumb while prying the spring end out and under the anchor.
    
14. Fill the master cylinder with fluid and bleed the brake system.
15. Before driving the vehicle, pump the brakes several times to seat the pads.
16. Install the wheels.

Rear

1. Drain 2?3 of the brake fluid from the front reservoir. Use the bleeder screw at the front outlet port to drain the fluid. If equipped with anti-lock brakes, relieve the system pressure.
2. Raise and safely support the vehicle.
3. Remove the wheels.
4. Insert a small prybar through the caliper opening and pry the caliper (using the outboard brake pad) to bottom the piston in the caliper bore. NOTE: This will back the brake pads off of the rotor surface to facilitate the removal and installation of the caliper assembly.
   
5. Pry the caliper support spring out of the caliper.
6. Remove both caliper slide pin bushing caps and slide pins.
7. Lift the caliper from the anchor.
8. Using a piece of mechanics wire, support the caliper so there is not tension on the brake hose.
9. Remove the brake pads from the caliper. Fig. 3: Installing the inward brake pad on the rear caliper piston - 1999-01 Grand Cherokee
   To install:
   
10. Position the brake pads onto the caliper.
11. Position the caliper into place on the anchor.
12. Coat the caliper slide pins with silicone grease and torque them to 21-30 ft. lbs. (29-41 Nm). Install the slide pin bushing caps.
13. Install the caliper support spring in the top of the caliper under the anchor; then, install the other end into the lower caliper hole. NOTE: Hold the spring in the caliper hole with your thumb while prying the spring end out and under the anchor.
    
14. Fill the master cylinder with fluid and bleed the brake system.
15. Before driving the vehicle, pump the brakes several times to seat the pads.
16. Install the wheels.

Removal & Installation

1. Before servicing the vehicle, refer to the Precautions section.
   
2. Remove or disconnect the following:
   
   • Negative battery cable
     
   • Front wheels
     
3. Place a C-clamp over the caliper as illustrated, place a screw drive head against the outboard pad and hook against the rear of the caliper. Slowly tighten the screw drive and retract the caliper pistons into their bores and breaking the outboard brake pad from the caliper fingers.
   
4. Once the pad is free, slide the caliper in on the guides to provide clearance between the rotor and inboard pad.
   
5. Place an appropriate prytool through the center opening in the top of the caliper behind the inboard pad between the pistons using care not to contact the piston boots. Pry the pad to free it from the pistons.
   
6. Remove the two caliper guide pin bolts and position the caliper aside. Remove the brake pads.
   

Place a C-clamp over the caliper as illustrated


View of the caliper guide pins and boots (1), anti-rattle clips (2), brake rotor (3), outboard pad (4), caliper adapter (5) and inboard pad (6)

To install:

1. Completely compress the caliper pistons
   
2. Install or connect the following:
   
   • Brake pads with anti-rattle clips onto the adapter
     
   • Caliper and align the guide pin bolt holes with the guide pins. Install the pin bolts and tighten to 32 ft. lbs. (43 Nm).
     
   • Banjo bolt with new washers on each side of the hose fitting and tighten to 35 ft. lbs. (47 Nm)
     
   • Wheels
     
   • Negative battery cable
     
3. Check and adjust the brake system fluid level and road test the vehicle.
   

PLEASE DON'T FORGET TO RATE!!!!

Removal & Installation

1. Before servicing the vehicle, refer to the Precautions section.
   
2. Remove or disconnect the following:
   
   • Negative battery cable
     
   • Front wheels
     
3. Place a C-clamp over the caliper as illustrated, place a screw drive head against the outboard pad and hook against the rear of the caliper. Slowly tighten the screw drive and retract the caliper pistons into their bores and breaking the outboard brake pad from the caliper fingers.
   
4. Once the pad is free, slide the caliper in on the guides to provide clearance between the rotor and inboard pad.
   
5. Place an appropriate prytool through the center opening in the top of the caliper behind the inboard pad between the pistons using care not to contact the piston boots. Pry the pad to free it from the pistons.
   
6. Remove the two caliper guide pin bolts and position the caliper aside. Remove the brake pads.
   

Place a C-clamp over the caliper as illustrated


View of the caliper guide pins and boots (1), anti-rattle clips (2), brake rotor (3), outboard pad (4), caliper adapter (5) and inboard pad (6)

To install:

1. Completely compress the caliper pistons
   
2. Install or connect the following:
   
   • Brake pads with anti-rattle clips onto the adapter
     
   • Caliper and align the guide pin bolt holes with the guide pins. Install the pin bolts and tighten to 32 ft. lbs. (43 Nm).
     
   • Banjo bolt with new washers on each side of the hose fitting and tighten to 35 ft. lbs. (47 Nm)
     
   • Wheels
     
   • Negative battery cable
     
3. Check and adjust the brake system fluid level and road test the vehicle.
   

they are a torx or star looking head on the back side of the caliper.

It is not the brake computer. The front left inside brake pad is the noly pad with a sensor in it. If the light is on it is usually because the wire connector broke and is now causing an open signal, cauing the light in the cluster to come on. Remove the front left wheel. Remove the connector for the brake pad attached to the shock assembly. Check the terminals for corrosion. The pins must be clean and not blackend or green. The female side connector terminals must be straight and not widened. If you want to be sure you can do 1 of 2 things. Check the resistance of the the 2 pins going to the brake pad. It must be 0 resistance meaning not open. Or bypass the female connector temporarily with a paper clip or wire and start the car. If the light goes off it means the pad is the cause or the connector. I have often seen the wire still holding and not broken completely but when you remove the pad the ridge of the inside of the disk has worn the wire to the point where it broke prematurally. Sometimes just a light tug and it'll break.

i think the pin u are reffering to is to replace the old pin on the caliper not on the pads itself.its more of a bushing to align the caliper correctly since they tend to wear out.
the only type of braking system that has an alignment pin for pads is on the heavy-duty series cummins deisel trucks mosltly 1 and 3 ton trucks