Ball Joint - Lower

This procedure covers the removal and replacement of the lower ball joint on a 1994-2007 Dodge Ram 2500 4WD with 5.9L Cummins diesel engine.

Warnings

Tools required

Parts

• Lower ball joint (screw-in or bolt-in type depending on application) × 1 — Moog K3134T or equivalent
• Cotter pin × 1 — Use OEM specification
• Ball joint boot (if not included with ball joint) × 1 — Check if included with ball joint

Preparation

1. Park vehicle on level ground and apply parking brake
2. Chock rear wheels securely
3. Loosen wheel lug nuts on the side being serviced while vehicle is on ground
4. Raise front of vehicle and support securely on jack stands under frame rails
5. Remove wheel and tire assembly
6. Spray all suspension fasteners with penetrating oil and allow to soak

Procedure

1. 1

   Remove wheel and access lower ball joint
   With vehicle raised and supported, remove the wheel completely. Inspect the lower ball joint for excessive play by grasping the tire at 6 and 12 o'clock positions and attempting to rock it. Visible movement at the ball joint indicates wear. Clean the area around the lower ball joint castle nut and cotter pin with wire brush.
2. 2

   Disconnect steering knuckle from lower ball joint
   Remove the cotter pin from the lower ball joint castle nut using cotter pin puller or pliers. Remove the castle nut using the appropriately sized socket (verify size for your axle; typically a large socket in the 1-1/8 inch range). Do not fully remove the nut initially - back it off until it is flush with the end of the stud to protect threads. Strike the steering knuckle boss area sharply with a hammer to shock the taper loose, or use a pickle fork or ball joint separator tool. Once taper is broken, remove the castle nut completely and separate the knuckle from the ball joint stud.
   ⚠Using a pickle fork will likely destroy the ball joint boot. This is acceptable if replacing the joint but avoid if inspecting only.
3. 3

   Support lower control arm
   Support the front axle with a jack stand. Note: the 4WD Ram 2500 uses a solid front axle (Dana 44 or Dana 60), so the lower ball joint is pressed into the axle yoke/knuckle, not into a control arm, and there is no coil spring loaded on a control arm to relieve.
   ⚠️The coil spring is under significant tension. The jack must remain in place throughout the procedure to prevent sudden release of the control arm.
4. 4

   Remove original ball joint from control arm
   The factory lower ball joint is press-fit into the steering knuckle of the solid front axle. Use a heavy-duty ball joint press with the appropriate adapters/receiving cup to press the old joint out of the knuckle. Position the receiving cup to accept the joint and press it out of the bore.nt press with appropriate adapters to press the old joint out of the control arm bore. Position the press receiving cup on the bottom of the control arm and press the ball joint upward and out.
   ⚠Ensure ball joint press is properly centered and seated to avoid damaging the control arm bore.
5. 5

   Clean control arm bore
   Thoroughly clean the ball joint bore in the control arm using a wire brush and solvent. Remove all rust, debris, and old paint from the bore to ensure the new ball joint seats properly. Inspect the bore for damage, cracks, or excessive wear. If the bore is damaged or excessively worn, the control arm must be replaced.
6. 6

   Install new ball joint
   Verify the new ball joint type matches your application (press-in, bolt-in, or screw-in). Position the new ball joint in the steering knuckle bore and use the ball joint press with proper adapters to press it into the knuckle until fully seated. Verify seating and torque specifications against the specific ball joint kit instructions for this solid-axle application. nuts from below, tightening to manufacturer specifications (typically 50-60 lb-ft, but verify with kit instructions).
   ⚠Do not press on the ball joint stud. Press only on the outer housing. Pressing on the stud will damage the internal components.
7. 7

   Reconnect steering knuckle to ball joint
   With the floor jack still supporting the lower control arm, align the steering knuckle with the new ball joint stud. Insert the stud through the knuckle boss. Install the castle nut and tighten to the factory-specified torque for your axle (verify — commonly higher than 100 lb-ft on Dana 44/60). If the cotter pin holes do not align, continue tightening (never loosen) up to the maximum allowed spec until the next castellated slot aligns with the hole. Never loosen the nut to align holes.
   ⚠The castle nut must be torqued properly and secured with a new cotter pin. Failure will result in the joint separating during operation.
   Torque spec

   Lower Ball Joint Nut88 Nm (65 lb-ft)
8. 8

   Install new cotter pin
   Insert a new cotter pin through the castle nut and ball joint stud. Bend the legs of the cotter pin around the castle nut - one leg up and over the top of the nut, the other leg down along the side of the stud. Ensure the cotter pin is secure and cannot work loose. Trim excess length if necessary, leaving approximately 1/4 inch past the bend.
9. 9

   Remove jack and verify clearances
   Carefully lower and remove the floor jack from under the control arm. Verify that all components have proper clearance and that nothing is binding. Cycle the suspension through its travel range by hand to ensure the new ball joint operates smoothly and does not contact any other components.
10. 10

    Reinstall wheel and lower vehicle
    Reinstall the wheel and tire assembly. Thread lug nuts by hand to prevent cross-threading. Snug lug nuts in a star pattern but do not fully torque yet. Lower the vehicle until the tire just contacts the ground but the suspension is not fully loaded. Final torque the wheel lug nuts to specification in a star pattern. Lower vehicle completely to the ground. Correct-size lug nut socket (verify for your wheels; larger than 21mm is common on 2500 8-lug wheels)
    Torque spec

    Wheel Lug Nuts183 Nm (135 lb-ft)

Reassembly

1. All suspension components must be inspected for wear during ball joint replacement
2. If replacing one lower ball joint, strongly consider replacing the opposite side as wear patterns are typically similar
3. Control arm bushings should be inspected while performing this repair

Verification

• With vehicle on the ground, bounce each corner of the front suspension and listen for any unusual noises from the ball joint area
• Perform a test drive at low speed in a safe area, making gentle turns in both directions to verify proper operation
• Re-check wheel lug nut torque after 25-50 miles of driving
• Have front end alignment checked and adjusted as ball joint replacement affects alignment settings
• Visually inspect the new ball joint boot for proper seating and no tears or damage
• Check for proper grease fill if ball joint has grease fitting (some are sealed, others have zerk fittings)

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