Upper Control Arm - Front

Replace the front upper control arm on a 2008 Dodge Viper, including ball joint separation, fastener removal, and alignment preparation.

Warnings

Tools required

Parts

• Front upper control arm × 1 — Use OEM specification or equivalent
• Upper control arm mounting bolts/nuts (if not reusable) × 1 — Check condition during removal
• Ball joint nut × 1 — Replace if damaged during removal

Preparation

1. Park vehicle on level, solid surface and engage parking brake
2. Mark the current position of the control arm mounting bolts relative to their mounting brackets with paint or a scribe for reference during installation
3. Loosen the front wheel lug nuts while vehicle is on the ground
4. Raise the front of the vehicle using a floor jack at the manufacturer-specified jacking point
5. Support vehicle securely on jack stands placed under the frame rails
6. Remove the front wheel on the side being serviced

Procedure

1. 1

   Support the lower suspension
   Position a floor jack under the lower control arm or knuckle assembly to support the weight of the suspension components. Raise the jack just enough to take load off the upper control arm without lifting the vehicle off the jack stands. This prevents the suspension from dropping when the upper control arm is disconnected.
2. 2

   Remove the upper ball joint nut
   Locate the upper ball joint where it connects to the steering knuckle. Remove the cotter pin if present. Using a socket and breaker bar, loosen and remove the upper ball joint castle nut. Note the depth of thread engagement for reference during reassembly.
3. 3

   Separate the ball joint from the knuckle
   Using a ball joint separator tool (pickle fork or press-type), separate the upper ball joint stud from the steering knuckle. Position the tool between the control arm and knuckle, then drive or press the joint apart. The knuckle will drop slightly when separated; ensure the floor jack is supporting the lower suspension to prevent damage to CV axle or brake lines.
   ⚠Ball joint may separate suddenly. Keep hands clear of pinch points between control arm and knuckle.
4. 4

   Locate and access upper control arm mounting bolts
   From the engine compartment, locate the two upper control arm mounting bolts that attach the control arm to the frame/mounting bracket. On the Viper, these are typically accessed from above near the shock tower area. Clean any dirt or debris from around the fasteners.
5. 5

   Remove front mounting bolt
   Using a socket and breaker bar, remove the front mounting bolt that secures the control arm to the frame bracket. This bolt passes through a bushing in the control arm. Support the control arm as you remove the bolt to prevent it from falling.
   ℹ️If alignment reference marks were made during preparation, note their position relative to this bolt location.
6. 6

   Remove rear mounting bolt
   Remove the rear mounting bolt that secures the opposite end of the control arm to the frame bracket. The control arm is now free to be removed from the vehicle.
7. 7

   Remove the upper control arm
   Carefully maneuver the upper control arm out of the mounting bracket and away from the vehicle. The arm will need to be angled to clear the shock tower and other suspension components. Inspect the mounting brackets on the frame for damage, cracks, or excessive wear.
8. 8

   Inspect and prepare mounting points
   Thoroughly inspect the frame mounting brackets for cracks, deformation, or thread damage. Use a wire brush to clean the mounting bolt holes and bracket surfaces. Check that the mounting bolt threads in the frame are clean and undamaged. Apply a light coating of anti-seize compound to the bolt threads if not using pre-coated bolts.
9. 9

   Position new upper control arm
   Position the new upper control arm into the frame mounting brackets. Align the bushing holes with the mounting bolt holes in the brackets. If alignment reference marks were made during disassembly, attempt to position the arm in a similar orientation to minimize alignment deviation.
10. 10

    Install mounting bolts finger-tight
    Insert both front and rear mounting bolts through the frame brackets and control arm bushings. Thread the nuts onto the bolts by hand until finger-tight. Do not torque at this stage; the suspension should be at ride height before final torquing.
11. 11

    Connect ball joint to knuckle
    Raise the steering knuckle using the floor jack positioned under the lower control arm until the upper ball joint stud aligns with the hole in the knuckle. Insert the ball joint stud into the knuckle. Thread the castle nut onto the ball joint stud and tighten to specification (estimated 50-60 ft-lbs, but verify with service manual). Install a new cotter pin through the castle nut and ball joint stud, bending the ends to secure.
    ⚠Ensure ball joint stud is fully seated in the knuckle taper before tightening nut. A partially seated taper can cause premature failure.
12. 12

    Lower suspension to ride height
    Carefully lower the floor jack supporting the lower control arm until the suspension is at or near normal ride height (wheel installed position). The control arm bushings must be torqued at this position to prevent premature bushing wear.
13. 13

    Torque control arm mounting bolts
    With the suspension at ride height, torque the front and rear upper control arm mounting bolts to specification (estimated 75-100 ft-lbs for the frame mounting bolts). Torque in the sequence: front bolt first, then rear bolt.
14. 14

    Reinstall wheel and lower vehicle
    Reinstall the wheel and hand-tighten the lug nuts in a star pattern. Remove the jack stands and lower the vehicle to the ground. With the vehicle weight on the wheels, torque the lug nuts to 100 ft-lbs in a star pattern.

Reassembly

1. Control arm mounting bolts must be torqued with the suspension at ride height to prevent bushing bind
2. Always install a new cotter pin in the ball joint castle nut; do not reuse old cotter pins
3. If alignment reference marks were not made or cannot be matched, expect significant toe and camber changes

Verification

• Verify all fasteners are tightened to specification and cotter pin is properly installed
• Check that ball joint stud rotates freely in the socket without binding (indicates proper seating)
• Bounce the front suspension several times and verify no unusual noises or loose components
• Test drive at low speed in a safe area to verify steering response before proceeding to alignment shop
• Have a professional four-wheel alignment performed immediately after this repair

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