Knuckle/Spindle - Front

Replacement of the front steering knuckle/spindle assembly, including disconnection of suspension and brake components, and hub bearing separation.

Warnings

Tools required

Parts

• Front steering knuckle/spindle assembly × 1 — Use OEM specification
• Cotter pin (ball joint) × 1 — Use OEM specification
• Hub bearing (if damaged or integrated) × 1 — Use OEM specification
• Brake dust shield (if damaged) × 1 — Use OEM specification

Preparation

1. Park vehicle on level ground and engage parking brake.
2. Loosen front wheel lug nuts while vehicle is on ground.
3. Raise front of vehicle and support securely on jack stands under manufacturer-recommended lift points.
4. Remove front wheel on side being serviced.
5. Apply penetrating lubricant to ball joint castle nut, tie rod end nut, and strut-to-knuckle bolts. Allow to soak while preparing tools.

Procedure

1. 1

   Remove brake caliper and rotor
   Remove the two caliper mounting bolts securing the brake caliper to the knuckle. Lift caliper off rotor and secure to suspension or frame using wire or bungee cord, ensuring no tension on brake hose. Remove rotor from hub by pulling straight off. If rotor is seized, use penetrating lubricant and light tapping with a rubber mallet.
2. 2

   Disconnect ABS speed sensor
   The 1992 Dodge Viper is not equipped with ABS or wheel speed sensors on the front knuckle. Skip this step. Verify no wiring or sensor is attached to the knuckle before proceeding.
3. 3

   Disconnect tie rod end from knuckle
   Remove the cotter pin from the tie rod end castle nut. Loosen but do not fully remove the castle nut (leave it flush with the end of the stud to protect threads). Using a ball joint separator or pickle fork, separate the tie rod end from the steering knuckle. Once separated, remove the castle nut completely and remove the tie rod end from the knuckle.
4. 4

   Disconnect lower ball joint from knuckle
   Remove the cotter pin from the lower ball joint castle nut at the bottom of the knuckle. Loosen but do not fully remove the castle nut (leave it flush with the stud end). Using a ball joint separator, break the taper between the ball joint stud and knuckle. Once separated, remove the castle nut completely. Support the lower control arm to prevent it from dropping suddenly.
5. 5

   Disconnect sway bar link from lower control arm
   If necessary for clearance, disconnect the sway bar end link from the lower control arm. Remove the nut securing the end link, using a backup wrench or Allen key on the stud as required to prevent rotation (verify link design for this vehicle). This provides additional clearance for knuckle removal.
   Torque spec

   Sway Bar Link61 Nm (45 lb-ft)
6. 6

   Mark and remove strut-to-knuckle bolts
   Mark the position of the upper and lower ball joint studs relative to the knuckle for reference; note that camber and caster are adjusted at the control arm mounts, so a professional alignment will be required after this repair. The front suspension is a double-wishbone (SLA) design; the knuckle attaches to an upper ball joint and a lower ball joint. Mark the upper ball joint position, remove the upper ball joint cotter pin and castle nut, and separate the upper ball joint stud from the knuckle using a ball joint separator.
7. 7

   Remove knuckle from hub assembly
   With all connections separated, carefully maneuver the knuckle assembly away from the vehicle. If the hub bearing is pressed into the knuckle, you may need to separate them using a hub puller or press. The hub may remain on the axle stub or come out with the knuckle depending on bearing condition. If the hub remains on the axle, remove the axle nut (if not previously removed) and pull the hub from the axle using appropriate pullers.
8. 8

   Inspect and transfer components to new knuckle
   Inspect the hub bearing, dust shield, and ABS tone ring (if separate from hub). If the hub bearing is serviceable and in good condition, press it out of the old knuckle and into the new knuckle using a hydraulic press and appropriate adapters. Ensure bearing is pressed squarely and fully seated. Transfer the brake dust shield to the new knuckle. Clean all mating surfaces thoroughly.
9. 9

   Install knuckle to hub and strut
   If hub was separated, press or install the hub into the new knuckle bearing. Position the new knuckle assembly onto the vehicle, aligning it with the strut bracket. Insert the strut-to-knuckle bolts and align with the reference marks made during removal. Install bolts but do not fully tighten yet to allow for final alignment.
10. 10

    Connect lower ball joint
    Raise the lower control arm into position and insert the ball joint stud into the bottom of the knuckle. Install the castle nut and torque to specification. Install a new cotter pin through the castle nut and stud, bending the ends to secure. If the cotter pin holes do not align, tighten the nut further (never loosen) until alignment is achieved.
    Torque spec

    Ball Joint Nut88 Nm (65 lb-ft)
11. 11

    Connect tie rod end
    Insert the tie rod end stud into the steering knuckle. Install the castle nut and torque to specification. Install a new cotter pin through the castle nut and stud, bending the ends to secure. If the cotter pin holes do not align, tighten the nut further (never loosen) until alignment is achieved.
12. 12

    Torque strut-to-knuckle bolts
    With all suspension components connected and the vehicle weight supported by jack stands (suspension at approximate ride height), torque the upper and lower ball joint castle nuts to specification and install new cotter pins.
    Torque spec

    Strut Bolts115 Nm (85 lb-ft)
13. 13

    Reinstall ABS sensor and brake components
    Clean the hub surface and install the brake rotor. Position the brake caliper over the rotor and install the caliper mounting bolts, torquing to specification.
    Torque spec

    Mounting Bolts27 Nm (20 lb-ft)
14. 14

    Reconnect sway bar link and install wheel
    If disconnected, reconnect the sway bar end link to the lower control arm and torque the nut to specification while holding the shaft with an Allen key. Install the wheel and thread lug nuts by hand. Lower the vehicle until the tire just contacts the ground.
    Torque spec

    Sway Bar Link61 Nm (45 lb-ft)
15. 15

    Final torque wheel lug nuts
    With vehicle weight on the ground, torque the wheel lug nuts to specification in a star pattern. Remove jack stands and lower vehicle completely.
    Torque spec

    Wheel Lug Nuts136 Nm (100 lb-ft)

Reassembly

1. Ensure all cotter pins are new and properly installed with ends bent to prevent loosening.
2. Verify all suspension fasteners are torqued to specification with vehicle at ride height or weight on wheels as required.
3. Check brake operation by pumping brake pedal several times before moving vehicle.

Verification

• Start vehicle and verify ABS warning light functions normally (illuminates briefly then extinguishes).
• Perform a slow-speed test drive and verify steering response is normal with no unusual noises.
• Check for any brake pulsation or noise during initial test drive.
• Schedule a professional front-end alignment as soon as possible, as knuckle replacement affects camber and caster settings.

More procedures for this vehicle