1500 Classic - Front Strut Replacement 🚚

Got it—you want to replace the front struts on your 1500 Classic. I’ll walk you through it step by step.

Quick check: Are you replacing front only, or front and rear (rear are shocks, not struts, on your truck)?

I’ll assume front struts and continue. If you also want rear shocks, tell me and I’ll add that section.

Safety & Important Notes ⚠️

• ⚠️ Spring danger: The front strut has a coil spring under high tension. You must use a proper coil spring compressor (a tool that safely squeezes the spring) if you are transferring springs to new struts.
• ⚠️ Support the truck correctly: Always use jack stands (metal supports that hold the vehicle safely) under the frame, never rely only on a jack.
• ⚠️ Alignment needed: After strut replacement, get a wheel alignment to avoid tire wear and pulling.

Beginner tip: The easiest way is to buy complete “loaded” strut assemblies (with spring and mount already installed). That avoids using a spring compressor.

Parts You’ll Need 📦

• 🛠️ 2x front strut assemblies (preferably complete “loaded” units for your 2020 1500 Classic 4WD)
• 🛠️ New upper strut mount nuts (recommended)
• 🛠️ New lower strut bolts/nuts if originals are rusty or damaged (optional but smart)

Tools You’ll Need 🔧

• 🛠️ Floor jack – hydraulic jack to lift the truck.
• 🛠️ Jack stands – to safely support the truck.
• 🛠️ Wheel chocks – blocks behind tires so the truck can’t roll.
• 🛠️ Socket set (metric):
  • Common sizes you’ll use: 10mm, 13mm, 18mm, 21mm, 24mm
• 🛠️ Wrenches (metric) – same sizes as sockets.
• 🛠️ Breaker bar – long handle for loosening tight bolts.
• 🛠️ Torque wrench – tool that tightens bolts to a specific torque.
• 🛠️ Pry bar – metal bar to gently move suspension parts.
• 🛠️ Hammer / rubber mallet – to tap bolts free if stuck.
• 🛠️ Penetrating oil – helps loosen rusty bolts.
• 🛠️ Coil spring compressor – only needed if you are reusing your original springs and mounts.
• 🛠️ Marker or paint pen – to mark cam bolts / alignment positions.

Key Torque Specs (Front) 📏

• 🛠️ Upper strut mount nuts: ~ 40 N·m (30 ft-lb)
• 🛠️ Lower strut-to-knuckle bolts: ~ 190 N·m (140 ft-lb)
• 🛠️ Stabilizer (sway bar) link nut: ~ 75 N·m (55 ft-lb)
• 🛠️ Wheel lug nuts: 176 N·m (130 ft-lb)

Values are typical for your truck; always tighten big suspension bolts firmly with a torque wrench.

Prep Steps 🧰

• 🛠️ Park on a flat, solid surface. Put the transmission in PARK and set the parking brake.
• 🛠️ Place wheel chocks behind the rear wheels.
• 🛠️ Loosen (do not remove) the front wheel lug nuts with the truck on the ground.

Lift and Support the Truck 🏗️

• 🛠️ Position the floor jack under the front frame crossmember and lift the front of the truck.
• 🛠️ Place jack stands under the frame rails on both sides.
• 🛠️ Lower the truck gently onto the stands and make sure it’s stable. Give the truck a small shake to confirm it’s solid.
• 🛠️ Remove the front wheels.

Remove the Old Front Strut (One Side at a Time) 🔩

• 🛠️ Spray bolts: Spray penetrating oil on:
  • Lower strut-to-knuckle bolts
  • Stabilizer (sway bar) link nut (if attached to the strut)
  • Upper strut mount nuts (under the hood)
• 🛠️ Disconnect sway bar link (if needed):
  • Use a 21mm socket/wrench on the sway bar link nut at the strut.
  • Hold the link stud with an internal hex or Torx (if it spins) while loosening the nut.
  • Move the link out of the way.
• 🛠️ Support the lower control arm:
  • Place the floor jack lightly under the lower control arm near the ball joint. This supports the suspension and makes bolt removal easier.
• 🛠️ Mark alignment (if cam bolts present):
  • If the lower strut bolts have cam washers (oval-shaped), mark their position on the knuckle with a paint pen. This helps keep alignment close until you get it professionally set.
• 🛠️ Remove lower strut bolts:
  • Use a 21mm–24mm socket and wrench on the two large bolts that clamp the strut to the steering knuckle.
  • Break them loose with a breaker bar, then remove the nuts and tap the bolts out with a hammer if needed.
• 🛠️ Under the hood – remove upper mount nuts:
  • Open the hood.
  • Locate the three upper strut mount nuts on the strut tower (above the wheel well).
  • Use a 13mm socket to remove the three nuts. Do NOT remove the center nut on the strut shaft if the strut is still under spring load.
• 🛠️ Remove the strut assembly:
  • Back at the wheel well, lower the jack slightly under the control arm to relieve pressure.
  • Pull the bottom of the strut free from the knuckle.
  • Angle the strut out and down, then remove it from the truck. You may need to gently push the knuckle outward.

If You’re Reusing Springs (Spring Compressor) ⚙️

If you bought complete loaded struts, skip this section.

• 🛠️ Mount the strut safely: Clamp the strut in a bench vise or hold it firmly on the ground.
• 🛠️ Install spring compressors:
  • Attach the two halves of the spring compressor on opposite sides of the coil spring.
  • Tighten each side evenly, a few turns at a time, until the spring is loose from the top and bottom seats.
• 🛠️ Remove center nut:
  • Use the correct socket on the center shaft nut while holding the shaft with an Allen/hex if needed.
  • Remove the nut, then lift off the top mount and bearing.
• 🛠️ Transfer spring and mount:
  • Move the compressed spring onto the new strut.
  • Align the end of the spring with the pocket in the lower spring seat.
  • Install the top mount and bearing in the same orientation as original.
  • Install the new center nut and tighten to spec (usually around 75–95 N·m / 55–70 ft-lb – check your strut manufacturer).
  • Slowly release the spring compressors, alternating sides, until the spring is fully seated.

Install the New Strut Assembly 🔧

• 🛠️ Position the strut:
  • Slide the new strut up into the strut tower from the wheel well.
  • From under the hood, start the three upper mount nuts by hand, but do not fully tighten yet.
• 🛠️ Attach to knuckle:
  • Align the lower strut with the steering knuckle.
  • Insert the two lower bolts through the knuckle and strut.
  • Install the nuts and snug them up, but don’t torque yet.
• 🛠️ Reconnect sway bar link:
  • Reinstall the sway bar link into the strut bracket.
  • Install the nut and snug it.
• 🛠️ Torque everything:
  • Torque the lower strut-to-knuckle bolts to about 190 N·m (140 ft-lb).
  • Torque the sway bar link nut to about 75 N·m (55 ft-lb).
  • Under the hood, torque the three upper mount nuts to about 40 N·m (30 ft-lb).

Reinstall Wheels & Final Steps 🚙

• 🛠️ Reinstall the front wheels and hand-tighten the lug nuts.
• 🛠️ Jack the truck up slightly, remove the jack stands, and lower the truck to the ground.
• 🛠️ Torque the lug nuts in a star pattern to 176 N·m (130 ft-lb).
• 🛠️ Start the truck and turn the steering wheel lock-to-lock while parked to make sure nothing binds.
• 🛠️ Take a short, slow test drive. Listen for clunks or odd noises.
• 🛠️ Schedule a 4-wheel alignment as soon as possible.

Rear Shocks (If You Also Want to Replace Them) 🔁

If you’d like, I can give you a short, separate guide for the rear shocks—they’re simpler than the front struts.

Next Step 👍

Reply with:

• 🛠️ “Front only” if this covers what you need, or
• 🛠️ “Front and rear” if you want the rear shock steps too.

HowToo makes it easy: below this answer you’ll see recommended strut assemblies, new hardware, and any specialty tools (like a spring compressor). You can add them to your cart right from the parts section, with fast shipping.