Ball Joints - Upper and Lower

Complete replacement of upper and lower control arm ball joints on the 1992 Dodge Viper, including suspension disassembly, ball joint pressing, and reassembly with proper alignment considerations.

Warnings

Tools required

Parts

• Upper ball joint × 2 — Use OEM specification
• Lower ball joint × 2 — Use OEM specification
• Cotter pins (various sizes) × 8 — 1/8 inch diameter

Preparation

1. Park vehicle on level surface and engage parking brake
2. Loosen wheel lug nuts on the side being serviced while vehicle is on ground
3. Raise vehicle with floor jack at appropriate jacking point
4. Support vehicle securely on jack stands rated for vehicle weight
5. Remove wheel and tire assembly completely
6. Apply penetrating oil to all ball joint castle nuts and allow to soak for 15-20 minutes
7. Have replacement ball joints, cotter pins, and all tools readily accessible before beginning disassembly

Procedure

1. 1

   Remove upper ball joint castle nut
   Locate the upper ball joint castle nut connecting the upper control arm to the steering knuckle. Using pliers or a cotter pin puller, remove and discard the cotter pin from the castle nut. Using an appropriate socket, remove the castle nut completely from the upper ball joint stud. Note the condition of the stud threads for inspection.
2. 2

   Separate upper ball joint from steering knuckle
   Position a ball joint separator tool between the upper control arm and steering knuckle, placing the fork end under the ball joint stud. Strike the tool firmly with a hammer to drive the wedge between the joint surfaces, breaking the taper fit. Alternatively, use a pickle fork pressed into the joint with steady force. Once separated, lift the upper control arm away from the knuckle to provide working clearance.
3. 3

   Remove lower ball joint castle nut
   Locate the lower ball joint castle nut at the base of the steering knuckle. Remove and discard the cotter pin from the castle nut. Remove the castle nut completely from the lower ball joint stud using an appropriate socket. Support the steering knuckle and brake assembly with a wire or bungee cord to prevent strain on the brake hose once the lower joint is separated.
4. 4

   Separate lower ball joint from steering knuckle
   Position the ball joint separator between the lower control arm and steering knuckle at the lower ball joint location. Strike or press the tool to break the taper fit between the ball joint stud and knuckle. Once separated, carefully lower or suspend the steering knuckle assembly clear of the control arms. Ensure brake lines are not under tension.
5. 5

   Remove upper ball joint from control arm
   The upper ball joint is pressed into the upper control arm. Position the control arm in a ball joint press or hydraulic press with the appropriate receiver cup supporting the control arm around the ball joint. Select a press adapter that contacts only the ball joint body, not the stud. Apply steady pressure to press the old upper ball joint out of the control arm bore. Clean the control arm bore thoroughly with a wire brush, removing all dirt, rust, and debris.
6. 6

   Install new upper ball joint
   Inspect the new upper ball joint to ensure the boot is intact and properly seated. Position the new ball joint in the control arm bore with the stud oriented correctly (pointing down toward where it will engage the knuckle). Using the ball joint press with proper adapters, press the new ball joint into the control arm bore until it is fully seated. Ensure the ball joint is pressed squarely and completely bottomed in the bore. The ball joint flange should be flush with the control arm surface.
7. 7

   Remove lower ball joint from control arm
   Position the lower control arm in the ball joint press with the receiver cup properly supporting the arm around the lower ball joint bore. Select the correct press adapter to contact only the ball joint body. Apply steady pressure to press the old lower ball joint out of the lower control arm. Clean the lower control arm bore thoroughly with a wire brush, removing all contamination to ensure proper seating of the new joint.
8. 8

   Install new lower ball joint
   Verify the new lower ball joint boot is intact and the joint moves freely within its normal range. Position the new lower ball joint in the control arm bore with correct orientation. Using the ball joint press with appropriate adapters, press the new ball joint into the lower control arm bore until fully seated. Ensure square installation with the ball joint flange completely contacting the control arm surface.
9. 9

   Reconnect lower ball joint to steering knuckle
   Position the steering knuckle so the lower ball joint bore aligns with the lower ball joint stud. Insert the lower ball joint stud through the steering knuckle bore, ensuring full engagement. Thread the new castle nut onto the lower ball joint stud hand-tight, then torque to specification. Tighten the castle nut to align the next castellated slot with the stud hole for cotter pin installation. If necessary, tighten further (never loosen) to achieve alignment. Install a new cotter pin through the castle nut and stud, then bend the pin legs to secure.
   Torque spec

   Ball Joint Nut102 Nm (75 lb-ft)
10. 10

    Reconnect upper ball joint to steering knuckle
    Position the upper control arm so the upper ball joint stud aligns with the upper bore of the steering knuckle. Insert the upper ball joint stud through the knuckle bore. Thread the new castle nut onto the upper ball joint stud hand-tight, then torque to specification. Tighten the castle nut to align the next castellated slot with the cotter pin hole in the stud. If needed, tighten further to achieve alignment (do not back off). Install a new cotter pin and bend the legs to secure the nut.
    Torque spec

    Ball Joint Nut102 Nm (75 lb-ft)
11. 11

    Inspect suspension assembly and reinstall wheel
    Visually inspect all suspension connections to ensure proper engagement and cotter pin installation. Check that ball joint boots are not torn or twisted. Verify no tools or parts were left in the wheel well area. Reinstall the wheel and tire assembly, threading lug nuts by hand initially. Torque wheel lug nuts to specification in a star pattern once vehicle is lowered.
12. 12

    Lower vehicle and perform final torque
    Carefully lower the vehicle from jack stands using the floor jack until the tire contacts the ground but vehicle weight is still partially supported. Torque the wheel lug nuts to specification in a star pattern. Fully lower the vehicle and remove the jack. Repeat the entire procedure for the opposite side if replacing both sides. Rock the vehicle side-to-side to settle the suspension before final checks.
    Torque spec

    Wheel Lug Nuts136 Nm (100 lb-ft)

Reassembly

1. Reassembly is integrated into the procedural steps above
2. Ensure all cotter pins are properly installed and secured with bent legs
3. Verify all ball joint boots are intact and not twisted after installation
4. Check that no tools, rags, or parts remain in the wheel well area

Verification

• With vehicle on ground, grasp the tire at 12 and 6 o'clock positions and attempt to rock it. There should be no perceptible play from the ball joints
• Grasp the tire at 3 and 9 o'clock positions and rock. Verify no play from ball joints (play here typically indicates tie rod issues)
• Visually inspect all ball joint castle nuts to confirm cotter pins are properly installed and bent
• Test drive vehicle at low speed in a safe area. Listen for clunking or popping noises from the suspension that would indicate improper installation
• Schedule wheel alignment immediately after completing this repair. Ball joint replacement affects camber, caster, and potentially toe settings

More procedures for this vehicle