🔧 GX460 - Front Brake Pad Replacement

You’ll remove the front pads from the fixed front brake calipers and install new pads with the correct shims/hardware. This restores braking performance and prevents metal-to-metal rotor damage when pads are worn thin.

Difficulty Level: Intermediate | Estimated Time: 1.5-3 hours

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⚠️ Safety & Precautions

• ⚠️ Support the truck with jack stands; never work under a jack-only vehicle.
• ⚠️ Brake dust is harmful—use brake cleaner, not compressed air.
• ⚠️ Brake fluid damages paint—cover fenders and wipe spills immediately.
• ⚠️ Keep hands clear when compressing pistons; move slowly and evenly.
• ⚠️ Battery disconnect is not required for front pads.

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🔧 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
• 21mm socket
• 1/2" drive breaker bar
• Torque wrench (30-200 ft-lbs range)
• Flathead screwdriver
• Needle-nose pliers
• Drift punch set (3/16" and 1/4")
• Small hammer
• Brake piston spreader (specialty)
• Large C-clamp (6" minimum)
• Bungee cord
• Wire brush
• Brake parts cleaner spray
• Turkey baster
• Shop rags
• Nitrile gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Front brake pad set - Qty: 1
• Front pad hardware kit (retaining pins/clips/anti-rattle spring) - Qty: 1
• Brake caliper grease (silicone-based) - Qty: 1
• Brake fluid (DOT 3) - Qty: 1 quart

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📋 Before You Begin

• Park on level ground, shift to Park, and set the parking brake.
• Chock the rear wheels with wheel chocks.
• Pop the hood and check the brake fluid reservoir level; if it’s near “MAX,” remove a little with a turkey baster so it won’t overflow when pistons are pushed back.
• Loosen (don’t remove) the front wheel lug nuts using a 21mm socket and breaker bar before lifting.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Lift and secure the front end

• Lift the front with a floor jack (rated 3-ton minimum) at the front jacking point.
• Set the frame onto jack stands (rated 3-ton minimum) and gently shake the truck to confirm it’s stable.

Step 2: Remove the front wheels

• Remove the lug nuts using a 21mm socket.
• Remove both front wheels and set them aside.

Step 3: Locate the pad retaining hardware

• Look at the front brake caliper (the large clamp that squeezes the rotor) and find the two horizontal retaining pins and the anti-rattle spring.
• Spray the pin area with brake parts cleaner spray and scrub lightly with a wire brush if it’s rusty.

Step 4: Remove the retaining pin clips and pins

• Remove the small pin clips using needle-nose pliers.
• Drive the retaining pins out using a drift punch set (3/16" and 1/4") and small hammer.
• Remove the anti-rattle spring as the pins come out.
• Tip: Hold the spring to prevent it popping out.

Step 5: Remove the old brake pads

• Slide the pads out of the caliper by hand. If they’re stuck, gently pry with a flathead screwdriver.
• Note how any shims sit on the pads so you can match the new pad stack-up.

Step 6: Compress the caliper pistons evenly

• On this fixed multi-piston setup, compress pistons slowly and evenly so the new, thicker pads will fit.
• Place an old pad against the pistons, then use a brake piston spreader (specialty) to push the pistons back in.
• If you don’t have a spreader, use a large C-clamp (6" minimum) and work gradually from one side to the other.
• Watch the brake fluid reservoir while compressing; remove fluid with a turkey baster if it rises too high.

Step 7: Prep the pad contact points

• Clean the pad abutment/contact points on the caliper with brake parts cleaner spray and a wire brush.
• Apply a very thin film of brake caliper grease (silicone-based) to pad ears/contact points and shim contact areas only.
• Do not get grease on the pad friction material or rotor surface; wipe with shop rags if needed.

Step 8: Install the new pads and shims

• Transfer/install shims per your pad kit instructions.
• Slide the new pads into the caliper by hand. They should move freely without force.

Step 9: Reinstall the anti-rattle spring, pins, and clips

• Position the anti-rattle spring in place.
• Tap the retaining pins back through using a small hammer and drift punch set (3/16" and 1/4").
• Reinstall the pin clips using needle-nose pliers.

Step 10: Reinstall wheels and torque lug nuts

• Reinstall the wheels and hand-thread the lug nuts.
• Lower the truck off the jack stands (rated 3-ton minimum) using the floor jack (rated 3-ton minimum).
• Tighten lug nuts in a star pattern with a torque wrench (30-200 ft-lbs range): Torque to 131 Nm (97 ft-lbs).

Step 11: Seat the pads before moving the vehicle

• With the engine off, pump the brake pedal slowly 10–15 times until it feels firm (this moves the pistons back out to the new pads).
• Check brake fluid level and top off with brake fluid (DOT 3) if needed.

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✅ After Repair

• Start the engine and confirm the brake pedal stays firm at idle.
• Check both calipers for any abnormal rubbing, loose hardware, or fluid leaks.
• Perform a pad bed-in: make 8–10 medium stops from 40 mph down to 10 mph, allowing 20–30 seconds between stops; avoid sitting stopped with hard pedal pressure right after the last stop.
• Recheck brake fluid level after the test drive.

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💰 DIY vs Shop Cost

Shop Cost: $300-$550 (parts + labor)

DIY Cost: $80-$200 (parts only)

You Save: $220-$350 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.

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🎯 Ready to get started?

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