Brake Pads - Front

Replace front brake pads on 1994-2007 Dodge Ram 2500 4WD with 5.9L Cummins diesel engine. This procedure covers removal and installation of brake pads in the front disc brake calipers.

Warnings

Tools required

Parts

• Front brake pad set (semi-metallic or ceramic) × 1 — Use OEM specification or quality aftermarket
• Brake hardware kit (clips and springs) × 1 — Often included with pad set

Fluids

• DOT 3 brake fluid — 0.25 qt

Preparation

1. Park vehicle on level, solid ground and place transmission in Park. Set parking brake firmly.
2. Loosen front wheel lug nuts 1/4 turn while vehicle is on the ground.
3. Lift front of vehicle using floor jack at the front axle differential or frame rail jacking points.
4. Secure vehicle on jack stands rated for at least 8000 lbs, positioned under the frame rails behind the front axle.
5. Remove front wheels completely and set aside.
6. Inspect brake rotors for scoring, cracks, or excessive wear. Measure rotor thickness if available (minimum thickness is stamped on rotor).
7. Open master cylinder reservoir cap and check fluid level. Remove some fluid with turkey baster if reservoir is at MAX line to accommodate piston compression.

Procedure

1. 1

   Remove caliper slide pin bolts
   Locate the two caliper slide pin bolts on the back side of the caliper. Bolt head size varies by year/caliper design; verify the correct socket size before removal. Remove both slide pin bolts completely. The caliper will now be free to pivot away from the rotor. Support the caliper and do not let it hang by the brake hose.
   Torque spec

   Caliper Slide Pin Bolts35 Nm (26 lb-ft)
2. 2

   Support and remove caliper
   Carefully pivot the caliper up and away from the brake rotor and pads. Use wire or a bungee cord to hang the caliper from the suspension or frame. Ensure there is NO tension or stress on the rubber brake hose. Never let the caliper hang by the brake line alone as this can damage the hose internally.
   ⚠Do not allow caliper to hang by the brake hose. This will damage the hose and can cause brake failure.
3. 3

   Remove old brake pads and hardware
   Remove the old brake pads from the caliper bracket. Note the position of any anti-rattle clips, shims, or springs. Take a photo if needed for reference during reassembly. Remove all old hardware clips from the caliper bracket. These should be replaced with new hardware from the brake pad kit.
4. 4

   Clean caliper bracket and slides
   Use a wire brush to clean the brake pad contact surfaces on the caliper bracket where the pads slide. Remove all rust, debris, and old grease. Spray with brake cleaner and wipe clean. Inspect the caliper slide pins for damage, corrosion, or torn rubber boots. Clean slide pins thoroughly and remove old grease.
5. 5

   Inspect caliper and rotor
   Inspect the caliper piston boot for cracks, tears, or leaking brake fluid. If damaged, the caliper must be rebuilt or replaced. Check the rotor surface for deep scoring (grooves deeper than 0.060 inches require rotor replacement). Measure rotor thickness with a micrometer if available and compare to minimum specification stamped on the rotor hat.
6. 6

   Compress caliper piston
   Using a C-clamp or brake caliper compression tool, slowly compress the caliper piston back into its bore. Place the clamp against the back of the caliper body and an old brake pad against the piston face. Compress slowly and evenly. Watch the master cylinder reservoir and remove fluid if it begins to overflow. The piston must be fully retracted to accommodate the new, thicker brake pads.
   ⚠Compressing the piston will force brake fluid back into the master cylinder and reservoir. Monitor reservoir level to prevent overflow.
7. 7

   Install new brake hardware
   Install all new anti-rattle clips, springs, and shims from the hardware kit onto the caliper bracket. Ensure they are fully seated and positioned exactly as the old hardware was removed. These clips prevent brake pad rattle and ensure proper pad movement.
8. 8

   Lubricate slide pins and install new pads
   Apply a thin coat of silicone brake grease to the caliper slide pins and reinstall them into the caliper bracket boots. Do NOT use petroleum-based grease as it will damage rubber components. Apply a very thin layer of brake grease to the pad backing plate ears where they contact the bracket and hardware clips. Install the new brake pads into the caliper bracket, ensuring the pad with the wear indicator is on the inboard position (toward the piston).
9. 9

   Reinstall caliper over pads
   Remove the caliper from its supported position and carefully lower it over the new brake pads. Align the caliper slide pin bolt holes with the slide pins in the bracket. The caliper should fit easily over the compressed piston and new pads. If it does not fit, the piston may need further compression.
10. 10

    Install and torque caliper slide pin bolts
    Apply medium-strength threadlocker to the caliper slide pin bolt threads if specified by the manufacturer; do not grease the threads or under the bolt head, as this affects clamp load on this safety-critical fastener. Install both slide pin bolts by hand and thread them in completely. Using a torque wrench, tighten both slide/guide pin bolts to the manufacturer-specified torque for your caliper type (verify in the factory service manual; heavy-duty Ram 2500 caliper guide pin bolts are commonly around 90-130 lb-ft, significantly higher than light-duty vehicles). Do not overtighten as this can damage the slide mechanism and cause uneven brake pad wear.
    Torque spec

    Caliper Slide Pin Bolts35 Nm (26 lb-ft)
11. 11

    Repeat for opposite side
    Perform steps 1 through 10 on the opposite front wheel. Both front brake pads must be replaced at the same time to ensure even braking performance. Never replace pads on only one side.
12. 12

    Reinstall wheels
    Install both front wheels onto the hubs. Thread all lug nuts by hand to ensure proper seating. Snug lug nuts in a star pattern with the wheel off the ground, then lower the vehicle until the tire just contacts the ground but is not fully weighted.
13. 13

    Torque wheel lug nuts and final checks
    With the vehicle weight on the tires but not fully lowered, use a torque wrench to tighten all lug nuts to the factory specification for your Ram 2500 (typically approximately 130 lb-ft / 176 Nm; verify in the service manual) in a star pattern. Make at least two complete passes to ensure even torque distribution. Fully lower the vehicle and remove jack stands. Check master cylinder reservoir and top off with the brake fluid type specified on the reservoir cap (typically DOT 3, but verify — some later models specify DOT 4) to the MAX line if needed. Reinstall reservoir cap.
    ⚠️Properly torqued lug nuts are critical for wheel retention. Use a calibrated torque wrench and follow star pattern sequence.
    Torque spec

    Wheel Lug Nuts183 Nm (135 lb-ft)
14. 14

    Pump brake pedal to seat pads
    Before moving the vehicle, sit in the driver's seat and pump the brake pedal slowly and firmly 10-15 times until the pedal feels firm and normal. This extends the caliper pistons and seats the new pads against the rotors. The pedal will go to the floor on the first few pumps - this is normal. Do NOT attempt to drive until the pedal is firm.
    ⚠️The brake pedal will go to the floor until pistons are re-extended. Pump pedal until firm BEFORE attempting to move vehicle.

Reassembly

1. Verify all caliper slide pin bolts are torqued to specification on both sides.
2. Verify all wheel lug nuts are torqued to specification in a star pattern.
3. Verify master cylinder reservoir is filled to MAX line with clean DOT 3 brake fluid.
4. Verify brake pedal is firm before moving vehicle.

Verification

• Start engine and pump brake pedal. Pedal should be firm and not sink slowly to the floor. If pedal is soft or spongy, bleeding may be required.
• Perform a low-speed test drive in a safe area (10-15 mph) and apply brakes firmly several times to verify proper operation and bed in new pads.
• Listen for any unusual noises such as grinding, squealing, or rubbing. Some light squealing during initial bedding is normal for new pads.
• After test drive, carefully feel each front wheel center (rotor area) - both sides should be similarly warm, indicating even brake application.
• Perform several moderate stops from 30-40 mph to begin bedding process. Avoid hard braking for the first 200 miles to allow proper pad break-in.
• After 50-100 miles, re-check wheel lug nut torque and verify torque values are maintained.
• Check for brake fluid leaks around caliper and master cylinder. Monitor brake pedal feel over the next several days.

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