Leaf Spring Shackle

Replace the rear leaf spring shackle on a 4WD 1994-2007 Dodge Ram 2500 with 5.9L Cummins diesel engine to restore proper suspension function and ride quality.

Warnings

Tools required

Parts

• Leaf spring shackle kit (includes bushings and hardware) × 1 — Use OEM specification or heavy-duty aftermarket
• Shackle bolts and nuts × 4 — Often included in shackle kit
• Anti-seize compound × 1 — Use nickel-based for steel fasteners

Preparation

1. Park vehicle on level, solid surface and engage parking brake
2. Place wheel chocks in front of front wheels
3. Spray all shackle bolts, nuts, and mounting hardware with penetrating oil and allow to soak for at least 2 hours (preferably 24-48 hours for corroded fasteners)
4. Loosen rear wheel lug nuts 1/2 turn while vehicle is on ground

Procedure

1. 1

   Raise and support vehicle
   Raise the rear of the vehicle using a floor jack at the rear axle housing. Place jack stands under the frame rails behind the cab, ensuring stands are on solid frame metal. Lower vehicle weight onto jack stands. Keep floor jack under axle with slight upward pressure to control axle position.
2. 2

   Remove rear wheel
   Remove the rear wheel lug nuts completely and remove the wheel to provide access to the leaf spring and shackle area. Set wheel aside in a safe location.
   Torque spec

   Wheel Lug Nuts183 Nm (135 lb-ft)
3. 3

   Support leaf spring
   Position the floor jack under the rear axle tube near the leaf spring to support the spring and control axle movement. Apply just enough pressure to slightly compress the spring and relieve tension on the shackle. The spring should be in its normal ride height position, not fully extended.
4. 4

   Remove lower shackle bolt
   Using the correct socket (verify size, commonly a large metric socket) and breaker bar, remove the nut from the lower shackle bolt that connects the shackle to the rear leaf spring eye. Hold the bolt head with another wrench if it spins. Drive the bolt out using a hammer and punch if seized. The shackle should pivot freely once this bolt is removed.
   ⚠If bolt is seized in bushing, apply heat carefully with a torch while avoiding rubber bushings and brake components. Bolt may need to be cut with an angle grinder if severely corroded.
5. 5

   Remove upper shackle bolt
   Remove the nut from the upper shackle bolt that connects the shackle to the frame bracket. Use the correct socket (verify size against the fastener) and breaker bar. Once the nut is removed, drive the bolt out using a hammer. Remove the complete shackle assembly from the vehicle. Note the orientation of bushings and any washers for reassembly.
6. 6

   Clean mounting surfaces
   Use a wire brush to clean the spring eye and frame bracket mounting surfaces. Remove all rust, dirt, and old bushing material. Inspect the spring eye and frame bracket for cracks, deformation, or excessive wear. Clean bolt holes thoroughly to ensure proper bolt installation.
7. 7

   Prepare new shackle assembly
   Unpack the new shackle kit and verify all components are present (shackle plates, bushings, bolts, nuts, washers). Install new bushings into the shackle eyes according to manufacturer instructions. Some bushings may be pressed in, others may be slip-fit. Apply a light coat of anti-seize to bolt threads.
8. 8

   Install shackle to frame bracket
   Position the new shackle assembly to the frame bracket. Insert the upper shackle bolt through the frame bracket and shackle eye. Install washer and nut finger-tight only. Ensure shackle orientation allows free movement toward the rear of the vehicle. Do not torque at this time.
9. 9

   Install shackle to leaf spring
   Align the lower shackle eye with the rear leaf spring eye. Use the floor jack to carefully adjust axle height as needed to align bolt holes. Insert the lower shackle bolt through the spring eye and shackle. Install washer and nut finger-tight only. Verify shackle moves freely and is not binding.
10. 10

    Torque shackle fasteners
    With the vehicle still on jack stands and the suspension at normal ride height (jack supporting axle with slight upward pressure), torque both shackle nuts to manufacturer specifications. Since specific torque is not in the database, consult the factory service manual for the exact shackle bolt torque specification for your model year before final tightening. Since specific torque is not in the database, consult factory service manual for exact specification. Hold bolt head while torquing nut to prevent bushing twist.
    ℹ️Torquing shackle bolts at ride height prevents bushing pre-load and premature bushing failure. Do not torque with suspension hanging or fully compressed.
11. 11

    Verify installation and clearances
    Remove floor jack from under axle and allow suspension to hang. Visually inspect shackle installation for proper alignment and clearance from frame, bed, and exhaust components. Manually cycle the suspension by pushing down on the bed and verify shackle moves freely through its full range of motion without binding or contact.
12. 12

    Reinstall wheel
    Reinstall the rear wheel onto the hub. Thread all lug nuts by hand to prevent cross-threading. Snug lug nuts in a star pattern with a socket, but do not fully torque yet.
    Torque spec

    Wheel Lug Nuts183 Nm (135 lb-ft)
13. 13

    Lower vehicle and final torque
    Raise vehicle slightly with floor jack to remove weight from jack stands. Remove jack stands and carefully lower vehicle completely to the ground. With full vehicle weight on wheels, torque wheel lug nuts to 183 Nm (135 lb-ft) in a star pattern using a torque wrench.

Reassembly

1. Repeat entire procedure for opposite side shackle if replacing both sides
2. Spray new shackle hardware with rust preventative or undercoating after installation
3. Check all fasteners for proper torque after first 50-100 miles of driving

Verification

• Test drive vehicle and verify no abnormal noises, clunks, or suspension binding during driving and turning
• Visually inspect shackle installation after test drive to confirm no movement or looseness
• Check vehicle ride height is equal side-to-side with no sagging on replaced shackle side
• Verify shackle moves freely through full suspension travel without binding or frame contact

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