🔧 Mustang - Shock Absorber Replacement

This repair replaces the rear shock absorbers on your Mustang. Worn rear shocks can cause bouncing, poor handling, uneven tire wear, and a loose feeling over bumps.

Difficulty Level: Intermediate | Estimated Time: 1.5-2.5 hours

---

⚠️ Safety & Precautions

• ⚠️ Work on a flat, solid surface and keep the vehicle stable at all times.
• ⚠️ Never work under your Mustang supported only by a jack. Use jack stands. A jack stand is a fixed support that safely holds the vehicle up.
• ⚠️ Replace rear shock absorbers in pairs so the suspension behaves evenly left to right.
• ⚠️ Keep hands clear when raising or lowering the rear suspension with the jack.
• ⚠️ Battery disconnect is not required for rear shock absorber replacement.

---

🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• 1/2-inch drive ratchet
• 1/2-inch drive breaker bar
• Torque wrench (10-150 ft-lbs)
• 13mm socket
• 15mm socket
• 18mm socket
• 21mm socket
• 13mm wrench
• 15mm wrench
• 18mm wrench
• Flat-blade screwdriver
• Trim clip removal tool
• Penetrating oil
• Safety glasses
• Mechanic gloves

---

🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Rear shock absorbers - Qty: 2
• Rear shock upper mount nuts - Qty: 4
• Rear shock lower mounting bolts - Qty: 2

---

📋 Before You Begin

• 🅿️ Park your Mustang on level ground.
• 🛞 Put the manual transmission in 1st gear and set the parking brake.
• 🧱 Place wheel chocks in front of the front tires.
• 🔩 Loosen the rear wheel lug nuts slightly before lifting the car. Do not remove them yet.
• 💡 A torque wrench tightens bolts to the correct force so they are not too loose or too tight.

---

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Loosen Rear Wheel Lug Nuts

• Use a 21mm socket and 1/2-inch drive breaker bar to loosen each rear wheel lug nut about 1/2 turn.
• Do this while the tires are still on the ground so the wheels do not spin.
• Do not remove lug nuts yet.

Step 2: Raise and Support the Rear

• Use a floor jack to lift the rear of your Mustang at the proper rear jacking point.
• Place jack stands under the approved rear support points.
• Slowly lower the vehicle onto the jack stands using the floor jack.
• Gently push the car by hand to confirm it is stable before working underneath.

Step 3: Remove Rear Wheels

• Use a 21mm socket and 1/2-inch drive ratchet to remove the loosened lug nuts.
• Remove both rear wheels and place them flat under the side of the car as an added safety backup.

Step 4: Access the Upper Shock Mounts

• Open the trunk.
• Use a trim clip removal tool to carefully remove the trunk trim clips near the rear shock tower area.
• Use a flat-blade screwdriver only if needed to gently lift stubborn clips.
• Pull the trunk side trim back enough to see the upper shock mounting nuts.
• Move trim slowly to avoid broken clips.

Step 5: Support the Rear Suspension Arm

• Place the floor jack under the rear lower control arm near the shock absorber.
• Raise the jack just enough to support the control arm. Do not lift the car off the jack stand.
• This removes pressure from the shock bolt and makes removal safer.

Step 6: Remove the Lower Shock Bolt

• Spray the lower shock mounting bolt with penetrating oil if it looks rusty or tight.
• Use an 18mm socket with a 1/2-inch drive ratchet to remove the lower shock bolt.
• If the nut turns with the bolt, hold it with an 18mm wrench while turning the bolt with the 18mm socket.
• Slide the lower end of the shock free from the mounting bracket.

Step 7: Remove the Upper Shock Nuts

• Inside the trunk, use a 13mm socket and 1/2-inch drive ratchet to remove the upper shock mount nuts.
• Hold the shock from below with one hand while removing the last nut so it does not drop.
• Remove the shock absorber from the vehicle.

Step 8: Compare the New Shock

• Set the new shock next to the old one.
• Check that the length, mounting points, and upper mount style match.
• If the new shock came with shipping straps or retainers, remove them only when ready to install.
• Match parts before tightening anything.

Step 9: Install the New Shock Upper Mount

• Guide the new shock into position from underneath.
• Install the upper shock studs through the body opening.
• Inside the trunk, thread the new upper shock mount nuts on by hand first.
• Use a 13mm socket and torque wrench to tighten the upper shock mount nuts to Torque to 35 Nm (26 ft-lbs).

Step 10: Install the Lower Shock Bolt

• Use the floor jack to raise or lower the rear control arm until the lower shock eye lines up with the bracket.
• Install the new lower shock bolt by hand first to avoid cross-threading.
• Use an 18mm socket and 18mm wrench to snug the lower shock bolt.
• Final tightening should be done with the suspension at normal ride height.

Step 11: Repeat on the Other Side

• Move the floor jack to support the opposite rear lower control arm.
• Use the same 13mm socket, 18mm socket, and 18mm wrench to remove and install the other rear shock absorber.
• Torque the opposite upper shock mount nuts to Torque to 35 Nm (26 ft-lbs).

Step 12: Load the Suspension and Torque Lower Bolts

• Use the floor jack under each lower control arm to raise the suspension close to normal ride height.
• Use an 18mm socket, 18mm wrench, and torque wrench to tighten each lower shock bolt to Torque to 115 Nm (85 ft-lbs).
• This prevents bushing twist, which can shorten the life of the new shocks.

Step 13: Reinstall Trunk Trim

• Push the trunk side trim back into position by hand.
• Use the trim clip removal tool only as needed to align clips.
• Press all trim clips fully into place.

Step 14: Reinstall Rear Wheels

• Install both rear wheels by hand.
• Thread all lug nuts by hand first.
• Use a 21mm socket and 1/2-inch drive ratchet to snug the lug nuts in a star pattern.

Step 15: Lower Vehicle and Torque Lug Nuts

• Use the floor jack to raise the rear slightly and remove the jack stands.
• Lower the vehicle fully to the ground.
• Use a 21mm socket and torque wrench to tighten the rear lug nuts in a star pattern to Torque to 204 Nm (150 ft-lbs).

---

✅ After Repair

• ✅ Bounce each rear corner by hand. The car should settle quickly without repeated bouncing.
• ✅ Take a slow test drive over small bumps and listen for clunks or rattles.
• ✅ Recheck the rear lug nut torque after 25-50 miles using a 21mm socket and torque wrench.
• ✅ If your Mustang pulls, feels unstable, or the tires were already wearing unevenly, have a four-wheel alignment checked.

---

💰 DIY vs Shop Cost

Shop Cost: $450-$750 (parts + labor)

DIY Cost: $160-$350 (parts only)

You Save: $290-$400 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.5-2.0 hours.

---

🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.