Front Suspension Rebuild

Complete replacement of front suspension components including upper and lower control arms, ball joints, bushings, strut assemblies, sway bar links, and tie rod ends for the 1992 Dodge Viper's independent front suspension.

Warnings

Tools required

Parts

• Upper control arm assembly (driver side) × 1 — Use OEM specification
• Upper control arm assembly (passenger side) × 1 — Use OEM specification
• Lower control arm assembly (driver side) × 1 — Use OEM specification
• Lower control arm assembly (passenger side) × 1 — Use OEM specification
• Strut assembly (driver side) × 1 — Use OEM specification
• Strut assembly (passenger side) × 1 — Use OEM specification
• Sway bar end link (driver side) × 1 — Use OEM specification
• Sway bar end link (passenger side) × 1 — Use OEM specification
• Outer tie rod end (driver side) × 1 — Use OEM specification
• Outer tie rod end (passenger side) × 1 — Use OEM specification
• Ball joint pinch bolts × 4 — Use OEM specification
• Alignment shims (if applicable) × 1 — Retain originals or use OEM specification
• Anti-seize compound × 1 — Use copper or nickel-based
• Thread locker (medium strength) × 1 — Loctite 242 or equivalent

Preparation

1. Park vehicle on level, solid surface and engage parking brake
2. Place wheel chocks behind rear wheels
3. Loosen front wheel lug nuts while vehicle is on ground (do not remove)
4. Raise front of vehicle with floor jack at manufacturer-recommended jacking points
5. Place jack stands under frame rails on both sides at designated support points
6. Lower vehicle onto jack stands and verify stability
7. Remove front wheels completely
8. Spray all suspension fasteners with penetrating oil and allow to soak for 15-30 minutes
9. Photograph or mark alignment shim positions at upper control arm mounting points for reference

Procedure

1. 1

   Remove sway bar end links
   Locate the sway bar end links connecting the sway bar to the lower control arms. Using a wrench to hold the end link stud, remove the upper nut securing the end link to the sway bar. Remove the lower nut securing the end link to the lower control arm. Remove both end links from the vehicle. Inspect the sway bar bushings for wear while accessible.
2. 2

   Disconnect outer tie rod ends
   Remove the cotter pin from each outer tie rod end castle nut, then remove the castle nut at the steering knuckle. Use a tie rod end puller to separate the tie rod end taper from the knuckle bore. Count and record the number of exposed threads on the tie rod for approximate reinstallation reference. Loosen the tie rod end jam nut and unthread the outer tie rod end from the inner tie rod. Mark the position before removal if possible.
3. 3

   Disconnect brake caliper and secure aside
   Remove the two caliper mounting bolts from the rear of the caliper bracket. Carefully lift the caliper off the rotor without allowing it to hang by the brake hose. Use wire or a bungee cord to secure the caliper to the frame or suspension in a position that does not stress the brake line. Do not disconnect the brake hose unless replacement is required.
4. 4

   Remove brake rotor and ABS sensor
   Remove the rotor retaining screw if equipped and slide the brake rotor off the hub. If the rotor is stuck, use a rubber mallet to tap it loose. The 1992 Viper is not equipped with ABS, so there is no wheel speed sensor to remove at this step. Proceed directly to removing the brake rotor: remove the rotor retaining screw if equipped and slide the rotor off the hub, tapping with a rubber mallet if stuck.
5. 5

   Disconnect lower ball joint from knuckle
   Locate the ball joint pinch bolt passing horizontally through the bottom of the steering knuckle where it clamps onto the lower ball joint stud. Remove the pinch bolt and nut. Use a ball joint separator or carefully pry with a suitable tool to spread the knuckle opening and release the ball joint taper. Do not damage the knuckle or ball joint boot during separation.
6. 6

   Disconnect upper ball joint from knuckle
   Locate the ball joint pinch bolt passing through the top of the steering knuckle where it clamps onto the upper ball joint stud. Remove the pinch bolt and nut. Use a ball joint separator or carefully pry to spread the knuckle opening and release the ball joint taper. With both ball joints disconnected, carefully remove the steering knuckle and hub assembly from the vehicle. Set aside in a clean location.
7. 7

   Remove strut assembly
   Access the strut top mount from under the hood by locating the strut tower. Remove the three nuts securing the strut top mount to the chassis. Do not remove the center shaft nut at this time. Support the strut from below and remove the lower strut mounting bolt securing the strut to the lower control arm or steering knuckle bracket. Carefully lower and remove the strut assembly from the vehicle.
8. 8

   Disassemble strut assembly (if replacing components)
   Install a spring compressor onto the coil spring according to manufacturer instructions, ensuring even compression on opposite sides. Compress the spring until tension is removed from the top mount. Hold the strut shaft with a wrench or Allen key and remove the top shaft nut. Carefully remove the top mount, bearing plate, upper spring seat, and compressed spring. Mark the orientation of components for reassembly. If installing complete strut assemblies, skip this step.
   ⚠️Compressed springs can cause severe injury if released suddenly. Ensure spring compressor is properly installed and maintained throughout disassembly.
9. 9

   Remove upper control arm
   Locate the upper control arm mounting bolts at the frame rail. There are typically two bolts securing the control arm to the frame through rubber bushings. Note the position and quantity of any alignment shims present at the mounting points. Remove the mounting bolts and carefully extract the upper control arm from the vehicle, keeping shims organized by location for reinstallation reference.
10. 10

    Remove lower control arm
    Locate the lower control arm mounting bolts at the front crossmember or frame rail. The Viper typically uses a front and rear pivot bolt for the lower control arm. Remove both mounting bolts and extract the lower control arm from the vehicle. Inspect the mounting area for corrosion or damage.
11. 11

    Clean and inspect mounting points
    Use a wire brush to clean all suspension mounting points on the frame, crossmember, and knuckle. Remove rust, old thread locker, and debris. Inspect threaded holes for damage and chase with appropriate tap if necessary. Inspect frame mounting points for cracks or elongated bolt holes. Apply anti-seize compound to cleaned mounting surfaces.
12. 12

    Install new lower control arms
    Position the new lower control arm into the mounting location. Insert the front and rear pivot bolts through the control arm bushings and frame brackets. Install nuts finger-tight only at this stage. Ensure the control arm moves freely through its range of motion and is not binding. Do not torque the mounting bolts until the vehicle is at ride height.
13. 13

    Install new upper control arms
    Position any alignment shims at the upper control arm mounting points in their original configuration. Install the new upper control arm to the frame rail and insert mounting bolts. Install nuts finger-tight only at this stage. Verify shims remain in position and the control arm moves freely. Do not torque the mounting bolts until the vehicle is at ride height.
14. 14

    Assemble and install new strut assemblies
    If installing complete strut assemblies, proceed to installation. If rebuilding, transfer components to the new strut: install compressed spring onto the strut body with proper orientation, position upper spring seat, bearing plate, and top mount. Hold the strut shaft and install the top shaft nut, torquing to specification. Carefully and evenly release spring compressor tension. Position the strut assembly into the vehicle from below, aligning the top mount studs with the chassis holes. Install the three top mount nuts and tighten. Install and tighten the lower strut mounting bolt to the lower control arm or knuckle bracket.
    Torque spec

    Strut Top Mount Nuts25 Nm (18 lb-ft)
15. 15

    Reinstall steering knuckle and hub assembly
    Position the steering knuckle and hub assembly between the upper and lower control arms. Align the upper ball joint stud into the upper knuckle bore and insert the pinch bolt. Install nut finger-tight. Align the lower ball joint stud into the lower knuckle bore and insert the pinch bolt. Install nut finger-tight. Torque both ball joint pinch bolts to specification using new bolts if they are locknut style.
    Torque spec

    Ball Joint Pinch Bolt50 Nm (37 lb-ft)
16. 16

    Reinstall ABS sensor and brake components
    The 1992 Viper is not equipped with ABS, so no wheel speed sensor reinstallation is required. Proceed with brake component reinstallation. Slide the brake rotor onto the hub and install the retaining screw if equipped. Remove the caliper from its secured position and install it over the rotor. Install and torque the two caliper mounting bolts to specification.
17. 17

    Reconnect outer tie rod ends
    Thread the outer tie rod ends onto the inner tie rods to approximately the same position as recorded during removal (matching exposed thread count). Tighten the jam nuts finger-tight. Insert the tie rod end studs into the steering knuckle bores and install castle nuts. Torque to specification and install new cotter pins, advancing the nut if necessary to align the castle slots with the stud hole. Do not back off the nut to align the cotter pin.
18. 18

    Install new sway bar end links
    Position the new sway bar end links between the sway bar and lower control arm. Install the lower nut onto the end link stud where it connects to the control arm, holding the stud with a wrench. Install the upper nut where the end link connects to the sway bar. Torque both nuts to specification.
    Torque spec

    Sway Bar End Link Nuts60 Nm (44 lb-ft)
19. 19

    Torque control arm bolts at ride height
    Reinstall the front wheels and hand-tighten lug nuts. Carefully raise the vehicle slightly and remove jack stands. Lower the vehicle to the ground so it rests on its wheels at normal ride height. Alternatively, use jack stands positioned to support the lower control arms at ride height position. With the vehicle at ride height, torque the upper control arm mounting bolts to specification. Torque the lower control arm mounting bolts to specification. This sequence prevents premature bushing wear.
    Torque spec

    Upper Control Arm Bolts90 Nm (66 lb-ft)

    Lower Control Arm Bolts110 Nm (81 lb-ft)
20. 20

    Final torque wheel lug nuts and lower vehicle
    With the vehicle on the ground, torque all front wheel lug nuts to specification in a star pattern. Perform a final visual inspection of all suspension components to verify proper installation and torque. Pump the brake pedal several times to restore brake caliper piston position before moving the vehicle.

Reassembly

1. All control arm bushing bolts must be torqued at normal ride height to prevent bushing damage
2. Use new ball joint pinch bolts if original bolts are locknut style or show thread damage
3. Apply medium-strength thread locker to fasteners as appropriate except where specified otherwise
4. Verify all suspension fasteners are tightened to specification before driving
5. Adjust tie rod ends as needed during alignment to achieve proper toe setting

Verification

• Verify all suspension mounting bolts are torqued to specification and show no movement
• Confirm brake calipers are properly secured and brake pedal feels firm after pumping
• Check that ABS sensors are properly seated and electrical connectors are secure
• Verify steering knuckle moves freely through its range of motion without binding
• Perform a bounce test at each corner to verify struts are functioning and no suspension noise is present
• Schedule a professional four-wheel alignment immediately after completing this procedure
• Test drive at low speed in a safe area to verify proper suspension operation and steering feel
• Re-check all fastener torque after 50-100 miles of driving

Related trouble codes on this vehicle

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