Brake Rotor - Rear Single

Remove and replace a single rear brake rotor on a 1992 Dodge Viper, including caliper removal, rotor inspection, and proper torque specifications for reassembly.

Warnings

Tools required

Parts

• Rear brake rotor × 1 — Use OEM specification or equivalent
• Rotor set screw (if corroded) × 1 — M5 x 0.8 set screw

Preparation

1. Park vehicle on level surface and engage parking brake.
2. Loosen rear wheel lug nuts 1/4 turn while vehicle is on the ground.
3. Raise rear of vehicle with floor jack at designated rear jacking point.
4. Support vehicle securely on jack stands placed under rear axle or frame rails.
5. Remove wheel and tire assembly completely.
6. Verify parking brake is released and cables are not binding.

Procedure

1. 1

   Inspect brake system and prepare work area
   Inspect the brake caliper, rotor, and brake lines for damage or excessive corrosion. Spray brake cleaner on the rotor and caliper to remove brake dust. Wipe clean with shop towels. If brake pads are close to maximum thickness, consider compressing the caliper piston slightly now with a C-clamp to ease caliper removal.
2. 2

   Remove caliper mounting bolts
   Locate the caliper mounting bolts that secure the fixed caliper to the mounting bracket/knuckle. Using the appropriate socket, remove both caliper mounting bolts. Keep these bolts as they will be reused. Note: The Viper uses fixed opposed-piston calipers rather than sliding calipers, so there are no slide pins.
   ℹ️Caliper slide pins may have rubber boots. Inspect boots for tears and replace if damaged.
3. 3

   Remove and support brake caliper
   Carefully lift the brake caliper off the rotor and caliper bracket. Do not disconnect the brake hose. Support the caliper using a brake caliper hanger or heavy wire attached to the suspension or frame. Ensure there is no tension or stress on the rubber brake hose.
   ⚠Never let the caliper hang by the brake hose alone. Damage to the hose can cause brake failure.
4. 4

   Remove caliper bracket
   Locate the two caliper bracket bolts that mount the bracket to the rear spindle or axle housing. These are typically larger bolts located behind where the caliper was mounted. Remove both caliper bracket bolts using the appropriate socket. Remove the caliper bracket assembly completely.
   ℹ️Caliper bracket bolts may be tight. Use a breaker bar if necessary and ensure proper socket engagement to avoid rounding.
5. 5

   Remove rotor set screw
   Check whether a rotor retaining set screw is present on the face of the rotor (many Viper rotors are retained only by the wheel/lug studs and have no set screw). If a set screw is present, remove it; if corroded, use penetrating oil and an impact driver to avoid stripping the head.
6. 6

   Remove brake rotor
   Pull the brake rotor straight off the wheel hub. If the rotor is stuck due to corrosion, tap the back of the rotor with a rubber mallet while rotating it. Do not strike the rotor face. If severely stuck, spray penetrating oil around the hub and rotor interface and allow to soak before attempting removal again.
7. 7

   Clean hub surface
   Use a wire brush to clean all rust and corrosion from the wheel hub surface where the rotor seats. Clean the hub pilot diameter and the flat mounting surface thoroughly. Remove all loose debris and wipe clean with brake cleaner.
   ℹ️A clean hub surface ensures proper rotor seating and prevents runout that can cause brake pulsation.
8. 8

   Prepare and install new rotor
   Remove any protective coating from the new rotor using brake cleaner. Clean both rotor faces thoroughly. Apply a thin layer of anti-seize compound to the hub pilot diameter and mounting surface (avoid getting anti-seize on the rotor friction surface). Slide the new rotor onto the hub, aligning the set screw hole.
9. 9

   Install rotor set screw
   Install the rotor set screw and tighten to specification. This screw only holds the rotor during assembly; wheel lug nuts provide the actual clamping force during operation.
10. 10

    Reinstall caliper bracket
    Position the caliper bracket onto the spindle or axle housing mounting surface. Install both caliper bracket bolts and thread by hand first to ensure proper alignment. Tighten caliper bracket bolts to specification using a torque wrench in a criss-cross pattern.
    ⚠️Improperly torqued caliper bracket bolts can cause caliper detachment and complete brake failure.
11. 11

    Reinstall brake caliper
    Remove the caliper from its support hanger. Position the caliper over the new rotor and align the caliper mounting bolt holes with the bracket/knuckle. Install both caliper mounting bolts and thread by hand first. Tighten to specification using a torque wrench.
    ℹ️Do not use petroleum-based grease on slide pins as it will damage rubber boots.
12. 12

    Reinstall wheel and tire
    Position the wheel onto the hub and install all lug nuts by hand. Tighten lug nuts in a star pattern with a lug wrench or impact wrench, but do not torque fully yet.
13. 13

    Lower vehicle and torque wheel lug nuts
    Carefully raise the vehicle slightly with the floor jack to remove jack stands. Lower the vehicle completely to the ground. With the vehicle weight on the wheels, torque the lug nuts to specification in a star pattern using a torque wrench.
    ⚠Improper lug nut torque can cause wheel detachment. Always use a torque wrench for final tightening.

Reassembly

1. Reassembly is covered in the procedure steps above.
2. Ensure all fasteners are torqued to specification.
3. Verify brake caliper is secure and brake hose has no kinks or damage.

Verification

• Pump brake pedal several times until firm pedal is achieved. Pedal should not sink to the floor.
• Check brake fluid reservoir level and top off with DOT 3 brake fluid if necessary.
• Visually inspect for any brake fluid leaks around caliper and fittings.
• Test drive vehicle in a safe area at low speed and verify proper brake operation before normal driving.
• After 50-100 miles, re-torque wheel lug nuts to specification.
• Perform a second test drive to verify no brake pulsation, noise, or pulling to one side.

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