Parking Brake Actuator

Replace the parking brake actuator (cable tensioner mechanism) on a 1992 Dodge Viper, restoring proper parking brake function.

Warnings

Tools required

Parts

• Parking brake actuator assembly × 1 — Use OEM specification
• Parking brake cable clips (if damaged) × 2 — Use OEM specification

Preparation

1. Park vehicle on level, solid surface and engage parking brake.
2. Chock front wheels securely on both sides.
3. Loosen rear wheel lug nuts while vehicle is on ground.
4. Raise rear of vehicle using floor jack at differential or rear crossmember.
5. Support vehicle securely on jack stands placed at manufacturer-specified jacking points (frame rails).
6. Remove rear wheels completely.
7. Release parking brake pedal/lever to relieve cable tension.
8. Apply penetrating oil to actuator mounting fasteners and cable connections if corrosion is visible.

Procedure

1. 1

   Access the parking brake actuator
   Locate the parking brake actuator/equalizer assembly mounted to the underside of the vehicle, typically near the transmission tunnel or rear axle forward mounting area. The actuator is the cable junction point where the single input cable from the hand lever splits to left and right rear brake cables. Use a work light to inspect the mounting configuration and cable routing.
2. 2

   Disconnect the input cable
   Locate the front parking brake cable (from the hand lever) connection to the actuator. Note the cable end fitting and any adjustment mechanism. Disconnect the cable from the actuator by releasing the cable end from the actuator lever or clevis, then sliding the cable housing out of its retaining bracket. You may need to compress cable spring tension or remove a retaining clip.
3. 3

   Disconnect the rear brake cables
   Identify the left and right rear brake cable connections to the actuator equalizer or lever arms. Note cable routing and any guide clips. Disconnect both rear cables from the actuator by releasing cable ends from their attachment points (typically threaded adjusters or clevis pins). Remove any cable housing retaining clips securing the cables to the actuator bracket.
4. 4

   Remove actuator mounting fasteners
   Locate the mounting bolts or nuts securing the actuator bracket to the vehicle chassis or crossmember. The actuator is typically held by 2-3 mounting fasteners. Remove all mounting fasteners using appropriate metric sockets or wrenches. Support the actuator as you remove the final fastener to prevent it from falling.
5. 5

   Remove the actuator assembly
   Lower the actuator assembly away from its mounting location. Carefully maneuver it past any surrounding components, brake lines, or exhaust components. Inspect the mounting area for corrosion or damage. If the vehicle will remain in service with the old actuator removed, ensure cables are secured away from moving components or heat sources.
6. 6

   Prepare the new actuator
   Unpack the new parking brake actuator and verify it matches the original in cable connection points, mounting hole pattern, and overall configuration. Check that all pivot points move freely and return springs (if equipped) are properly installed. Apply light grease to pivot points if not pre-lubricated.
7. 7

   Install the new actuator
   Position the new actuator assembly in the mounting location, aligning mounting holes with chassis or crossmember. Thread mounting fasteners by hand to avoid cross-threading. Once all fasteners are started, tighten them evenly to secure the bracket. Torque mounting fasteners to specification if torque value is known for this platform.
8. 8

   Connect the rear brake cables
   Attach the left and right rear brake cables to the new actuator equalizer or lever arms in the reverse order of removal. Ensure cable ends are fully seated in their attachment points (threaded adjusters or clevis pins). Install any cable housing retaining clips to secure cables to the actuator bracket. Verify cables move freely without binding.
9. 9

   Connect the input cable
   Route the front parking brake cable to the new actuator. Insert the cable housing into its retaining bracket on the actuator, then connect the cable end to the actuator lever or clevis. Install any retaining clips. Do not adjust cable tension at this time.
10. 10

    Verify actuator operation
    With all cables connected, manually operate the actuator by pulling on the front cable connection point. Verify that both rear cables move equally and the actuator pivots smoothly without binding. Check that return springs (if equipped) return the actuator to the rest position when released. Inspect all cable connections for security.
11. 11

    Reinstall wheels and lower vehicle
    Reinstall both rear wheels, threading lug nuts by hand to avoid cross-threading. Snug lug nuts in a star pattern but do not fully torque yet. Raise vehicle slightly with floor jack, remove jack stands, then lower vehicle completely to the ground. Torque wheel lug nuts to specification in a star pattern.
    Torque spec

    Wheel Lug Nuts140 Nm (103 lb-ft)
12. 12

    Adjust parking brake cable tension
    Locate the parking brake cable adjustment mechanism (typically at the actuator or near the pedal/lever). With parking brake released, adjust cable tension according to factory specification. Verify equal braking force at both rear wheels and confirm the correct lever click count against Viper service documentation. Turn adjuster nut to increase or decrease cable tension. Verify equal braking force at both rear wheels.

Reassembly

1. Installation is performed in steps 6-12 above, mirroring the removal process.
2. Ensure all cable connections are secure and properly routed away from heat sources and moving components.
3. Verify parking brake adjustment provides proper holding force without rear wheel drag when released.

Verification

• With vehicle on level ground and parking brake released, verify rear wheels rotate freely by hand with no drag.
• Engage parking brake 3-5 clicks and attempt to push vehicle. It should not roll.
• With parking brake engaged, verify both rear wheels are locked equally (check by attempting to rotate each wheel).
• Test drive vehicle in a safe area at low speed and verify parking brake holds vehicle on a slight incline.
• After initial test, re-check cable adjustment and mounting fastener torque.
• CRITICAL: If parking brake does not hold vehicle securely, DO NOT operate vehicle. Re-inspect installation and cable adjustment, or consult a professional technician.

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