Replacement of the pitman arm, which connects the steering gearbox to the center link and converts rotational motion from the steering box to lateral motion for steering.

Warnings

Tools required

Parts

• Pitman arm × 1 — Use OEM specification or equivalent
• Pitman arm nut × 1 — Castellated nut with cotter pin
• Center link castle nut × 1 — Use OEM specification
• Cotter pins (1/8 inch diameter) × 2 — Standard automotive

Preparation

1. Park vehicle on level surface and apply parking brake
2. Place wheel chocks behind rear wheels
3. Turn steering wheel to center position and note steering wheel alignment
4. Raise front of vehicle and support securely on jack stands under frame rails
5. Remove front wheels for better access (optional but recommended)
6. Spray penetrating oil on pitman arm shaft nut and center link connection, allow to soak 15-20 minutes

Procedure

1. 1

   Mark pitman arm position
   Using a punch or permanent marker, scribe or mark a reference line across the pitman arm and steering box sector shaft to indicate their exact rotational relationship. This is critical for maintaining steering wheel centering. The sector shaft uses a master/index spline for orientation, but marking the relationship ensures proper reassembly and steering wheel centering.
2. 2

   Remove center link cotter pin and nut
   Locate where the pitman arm ball stud connects to the center link (drag link). Remove the cotter pin from the castle nut using pliers or wire cutters. Using a 15/16 inch wrench, remove the castle nut from the pitman arm ball stud. Set aside the old castle nut and cotter pin.
3. 3

   Separate pitman arm from center link
   Use a pitman arm puller or ball joint separator to break the taper fit between the pitman arm ball stud and center link. Position the puller jaws around the center link boss and against the ball stud, then tighten the puller screw to apply pressure. The joint will pop free with a sharp release. Do not use a pickle fork on the pitman arm ball stud as it will damage the boot and seal.
4. 4

   Remove pitman arm shaft nut
   Using a 1-1/8 inch socket and breaker bar, remove the large nut securing the pitman arm to the steering box sector shaft. This nut is typically torqued to approximately 80-100 ft-lb (verify against factory specification) and will require significant force. Note whether there is a lock washer present under the nut for reinstallation.
5. 5

   Install pitman arm puller
   Thread the pitman arm puller onto the sector shaft threads or position the puller appropriately for your style of tool. The puller must press against the end of the sector shaft while the jaws grip behind the pitman arm. Ensure the puller is centered and square to avoid damaging threads or the arm.
6. 6

   Remove pitman arm from shaft
   Tighten the puller screw gradually and firmly. The pitman arm is pressed onto serrated splines and may require substantial force to release. Continue applying steady pressure until the arm breaks free from the shaft with a sudden release. Never hammer on the pitman arm or sector shaft as this can damage the steering box.
7. 7

   Clean sector shaft splines
   With the pitman arm removed, use a wire brush to clean the sector shaft splines and taper. Remove any rust, corrosion, or old anti-seize compound. Inspect the splines for wear or damage. Clean the inside splines of the new pitman arm as well.
8. 8

   Align and install new pitman arm
   Align the master spline(s) on the sector shaft with the corresponding splines in the new pitman arm. The alignment marks made during disassembly should guide proper orientation, since the wide splines allow only a limited number of index positions. Slide the arm onto the shaft as far as possible by hand, ensuring proper spline engagement.
9. 9

   Install and torque pitman arm shaft nut
   Install the lock washer (if equipped) and thread the pitman arm shaft nut onto the sector shaft. Using a torque wrench and 1-1/8 inch socket, torque the nut to approximately 80-100 ft-lb (verify against factory specification). This high torque is necessary to fully seat the arm on the tapered splines and prevent movement during operation.
10. 10

    Connect pitman arm to center link
    Align the pitman arm ball stud with the center link. Insert the ball stud into the center link taper. Install the castle nut and tighten to 45 ft-lb using a 15/16 inch wrench and torque wrench. Advance the nut to the next castellated slot that aligns with the cotter pin hole if necessary.
11. 11

    Install cotter pin
    Insert a new 1/8 inch cotter pin through the castle nut and ball stud hole. Bend the ends of the cotter pin over to secure, ensuring they do not contact rotating or moving components. The pin should be snug and prevent the castle nut from loosening.
12. 12

    Check steering operation
    With vehicle still on jack stands, have an assistant turn the steering wheel slowly from lock to lock while you observe the pitman arm movement. Check for smooth operation, proper tracking, and verify no binding or interference. The steering should move freely without resistance or unusual noise.

Reassembly

1. Reinstall front wheels if removed and torque lug nuts to specification
2. Lower vehicle to ground
3. Start engine and turn steering wheel lock to lock several times to verify proper operation
4. Check power steering fluid level and top off if necessary

Verification

• With engine running, turn steering wheel fully left and right multiple times, listening for any unusual noises or binding
• Verify steering wheel is still centered when front wheels are pointing straight ahead
• Check for any fluid leaks around steering box sector shaft seal
• Test drive vehicle at low speed in safe area to confirm proper steering response and no wandering or pulling
• Visually inspect cotter pins are properly installed and secure
• Schedule a front-end alignment to verify toe and steering geometry after pitman arm replacement

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