How to Replace Front Brake Pads and Rotors on a 2020 Ram 1500 Classic
Step-by-step DIY front brake job with tools, parts list, torque specs, and safety tips for your 2020 Ram 1500 Classic for 2019, 2020, 2021, 2022, 2023, 2024
How to Replace Front Brake Pads and Rotors on a 2020 Ram 1500 Classic
Step-by-step DIY front brake job with tools, parts list, torque specs, and safety tips for your 2020 Ram 1500 Classic for 2019, 2020, 2021, 2022, 2023, 2024
1500 Classic - Front Brake Pads & Rotors Replacement 🛠️
You can absolutely do this at home if you go slowly and safely. I’ll walk you through it step by step.
Quick check first: Do you have a solid floor jack and a pair of jack stands? And do you have a basic socket set (metric) and a breaker bar or long ratchet? If not, tell me what you have and I’ll adjust the steps.
Safety First ⚠️
- 🧯 Work on level ground only, in Park, parking brake ON, engine OFF.
- 🧱 Chock the rear wheels (blocks behind and in front of tires) so the truck can’t roll.
- 🧤 Wear eye protection and gloves. Brake dust is nasty; avoid breathing it in.
- 🔥 Let brakes cool completely if you just drove; rotors can be very hot.
Parts You Need 📦
- 🛞 Front brake pads (set for both front wheels)
- 🛞 Front brake rotors (2, left and right)
- 🧴 Brake cleaner spray
- 🧴 High-temp brake grease (for pad contact points and slide pins)
- 🧵 Blue threadlocker (medium strength, for bracket bolts)
- 📏 Optional: new pad hardware kit (stainless clips for the caliper bracket)
Tools You Need 🔧
- 🧰 Floor jack and 2 jack stands
- 🔩 Lug wrench or 1/2" drive ratchet with 22 mm socket (lug nuts)
- 🔧 Socket set (metric):
- 13 mm (caliper slide pin bolts – common size)
- 21 mm (caliper bracket bolts – common size)
- 📏 Torque wrench (tool that lets you tighten bolts to a specific torque)
- 🪛 Flat screwdriver or small pry bar (to help remove caliper)
- 🧱 Wire or bungee cord (to hang the caliper so it doesn’t hang by the hose)
- 🧱 Rubber mallet or hammer (to tap off stuck rotors)
- 🧼 Small wire brush (to clean rust from bracket and hub)
- 🧴 C-clamp or disc brake piston tool (to push caliper piston back)
Key Torque Specs 🔩
- 🛞 Front wheel lug nuts: ~130 ft-lb
- 🔧 Caliper slide pin bolts: ~26 ft-lb
- 🔧 Caliper bracket bolts: ~130 ft-lb
These values are typical for your truck’s front brakes. If you have a torque wrench, use these numbers.
Prep Steps 🚗
- Pop the hood and remove the brake fluid reservoir cap (on driver side near firewall). Lay it loosely on top.
This lets fluid move back up when you push the pistons in. - Loosen (do not remove) the front wheel lug nuts 1/2 turn while the truck is still on the ground.
Lift and Support the Front 🏗️
- Place the floor jack under the front crossmember (sturdy metal beam under the front of the truck).
- Jack up until both front wheels are off the ground.
- Place jack stands under the frame rails on each side and slowly lower the truck onto them.
- Give the truck a gentle shake to confirm it’s stable.
- Remove the front wheels completely.
Remove Caliper & Old Pads (One Side at a Time) 🧱
- Turn the steering wheel to give better access to the side you’re working on (left or right).
- Locate the caliper slide pin bolts on the back of the caliper (usually 2 small bolts, top and bottom).
- Use your socket (likely 13 mm) to remove the slide pin bolts.
- Gently pry the caliper off the rotor using a flat screwdriver if needed.
Do not let the caliper hang by the rubber hose. - Hang the caliper from the suspension spring or frame using wire or a bungee cord.
- Slide the old brake pads out of the caliper bracket and note how they were installed (inner vs outer).
Remove Caliper Bracket & Rotor 🧱
- Locate the caliper bracket bolts on the back of the steering knuckle (2 large bolts).
- Use a larger socket (likely 21 mm) and a breaker bar to remove these bolts. They can be tight.
- Remove the caliper bracket and set it on a clean surface.
- Pull the rotor straight off the hub.
- If it’s stuck from rust, tap around the hat (center area) with a rubber mallet or hammer until it loosens.
Clean & Prep Bracket and Hub 🧼
- Use the wire brush to clean:
- The pad contact areas on the caliper bracket (where the pads slide).
- The hub face (where the rotor sits) so the new rotor sits flat.
- If you have new hardware clips, remove the old stainless clips from the bracket and snap the new ones in place.
- Pull out the slide pins (the smooth pins the caliper bolts to) one at a time:
- Wipe off old grease.
- Apply a thin coat of high-temp brake grease.
- Reinsert and make sure they move smoothly.
Install New Rotor 🛞
- Spray both sides of the new rotor with brake cleaner to remove the oily coating. Wipe with a clean rag.
- Place the new rotor onto the hub, lining up the holes with the studs.
- Thread on one lug nut by hand to hold the rotor in place while you work.
Reinstall Caliper Bracket 🔧
- Position the caliper bracket over the rotor and line up the bolt holes.
- Apply a small drop of blue threadlocker to the threads of each bracket bolt.
- Install the bolts by hand, then tighten with your socket.
- Torque the caliper bracket bolts to about 130 ft-lb.
Compress Caliper Piston 🧱
- Take the caliper you hung earlier and inspect the piston (round part that pushes the inner pad).
- Place an old brake pad against the piston face.
- Use a C-clamp or piston tool between the back of the caliper and the pad to slowly push the piston back into the caliper.
Go slowly and watch the brake fluid reservoir; fluid level will rise. - Stop if the reservoir gets close to the top; you may need to remove a little fluid with a clean syringe or turkey baster.
Install New Pads & Caliper 🧩
- Apply a thin layer of brake grease to:
- The ears (metal ends) of the pads where they contact the hardware clips.
- The pad backing plates where they touch the caliper or piston (not on friction surface).
- Slide the new pads into the bracket, inner and outer, same orientation as the old ones.
- Lower the caliper over the new pads and onto the bracket.
- Make sure the slide pins line up with the caliper holes.
- Install the slide pin bolts by hand, then tighten.
- Torque the slide pin bolts to about 26 ft-lb.
Repeat on the Other Side 🔁
Do the exact same steps on the other front wheel: pads, rotor, cleaning, greasing, torquing.
Reinstall Wheels & Lower Truck 🛞
- Remove the temporary lug nut holding the rotor.
- Install the wheel and hand-tighten all lug nuts in a star pattern.
- Jack the truck slightly to remove the jack stands, then lower it to the ground.
- Torque the lug nuts in a star pattern to about 130 ft-lb.
Final Steps & Brake Pedal Check ✅
- Reinstall and tighten the brake fluid reservoir cap.
- Before driving, sit in the truck and:
- Press the brake pedal slowly 5–10 times until it feels firm.
This seats the pads against the rotors.
- Press the brake pedal slowly 5–10 times until it feels firm.
- Check under the front for any leaks or loose parts.
Bed-In (Break-In) the New Brakes 🧪
Do this in a safe, empty road area.
- 🚦 Make 5–6 smooth stops from about 30–40 mph down to 5–10 mph, using medium brake pressure. Let the brakes cool for a minute between stops.
- 🚗 Avoid hard panic stops for the first 200–300 km if possible.
Want Help Choosing Parts? 🧰
If you tell me whether you want OEM-style (factory feel) or upgraded (better stopping / less dust), I can suggest pad and rotor types that fit your 1500 Classic.
HowToo makes it easy: below this answer you’ll see recommended pads, rotors, brake cleaner, grease, and tools. You can add them to your cart right from the parts section for fast shipping.


















