2006-2010 Jeep Commander Front vs Rear Brakes: What Wears First and What to Replace

By Core Brake Parts Tech Team — Circleville, OH warehouse

On a 2006-2010 Jeep Commander the front brakes almost always wear out first, usually by a wide margin, because the front axle does most of the stopping on a heavy, tall SUV. The rear discs still wear, and the rear hides a separate parking brake (small shoes inside the rotor hat) that gets forgotten. Check both ends at every tire rotation and replace pads and rotors in axle pairs.

How the Commander brake system is laid out

Every Commander from 2006 through 2010 uses disc brakes at all four corners. The front rotor is a heavy part (the common replacement front rotor ships at about 23 lbs), and it has to absorb most of the heat of every stop. The front and rear parts are shared with the 2005-2010 Grand Cherokee WK, so you will often see both vehicles on the same part fitment list.

The parking brake is not a caliper-applied system. It is a hand lever in the console that pulls cables to a pair of small brake shoes inside the "hat" of each rear rotor, a design usually called drum-in-hat. Replacement parking brake shoes are listed as a separate part for the Commander and Grand Cherokee WK.

On top of the hydraulics, the owner's manual describes an electronic brake control system that includes ABS, Traction Control, Brake Assist (BAS), Electronic Roll Mitigation and Electronic Stability. BAS senses a fast, hard pedal application and applies full pressure. None of that changes what wears, but it does mean the ABS warning light and pump noise are part of normal diagnosis.

Why the front brakes wear first

When any vehicle slows down, weight transfers forward. On a boxy, three-row SUV like the Commander, that transfer is significant, so the front tires have more grip and the brake system is proportioned to send them more of the work. More work means more heat and more friction material worn off per stop. That is why the front brakes are the first place to look when the pedal or steering starts to shake.

Several things make the gap even larger on a Commander:

• Towing. Jeep's manual warns that a trailer over 1,000 lbs without its own brakes can cause accelerated brake lining wear and longer stopping distances. It recommends trailer brakes above 1,000 lbs and requires them above 2,000 lbs.
• Full passenger loads. Seven people and cargo add mass the brakes have to absorb every stop.
• Off-road and mud. The manual specifically says to have rotors, wheels and brake linings inspected and cleaned after extended driving in mud, sand or water, because abrasive material causes excessive wear.
• Stop-and-go driving. Short trips with many stops wear the fronts faster than highway miles.

The rears are not immune. A dragging parking brake or a rear caliper slide that has seized can wear a rear pad down before the fronts, so never assume the rear is fine just because it usually lasts longer.

Symptoms and how to tell which end is the problem

Most complaints give you a clue about which axle is involved:

• Steering wheel shake when braking usually points to the front rotors, because they are connected to the steering.
• Seat or body shudder with a steady steering wheel is more often the rear rotors.
• Grinding from one corner means the pad is gone and metal is on the rotor. Stop driving on it and inspect that corner.
• Pulling to one side suggests a sticking front caliper or a contaminated pad.
• One rear wheel much hotter than the other after a drive, or a burning smell points to a dragging rear caliper or parking brake shoes. The manual warns that driving with the parking brake not fully released can overheat the rear brakes.
• Falling fluid level. Per the owner's manual, the master cylinder level is expected to drop slowly as disc pads wear, but a low level can also mean a leak, so do not simply top it off without looking.

The quickest check is visual: pull the wheels at tire rotation, look at pad thickness through the caliper window on both the inner and outer pad, and look for lips, grooves or heat spots on the rotor faces. Compare left to right on the same axle. Uneven wear side to side means a hardware or caliper problem, not just worn pads.

What to replace, front and rear

Front brake job

Replace pads on both front wheels together, never one side. If the rotors are grooved, lipped, below the minimum thickness stamped on the rotor, or causing a vibration, replace them as a pair too. For daily driving and light towing, a semi-metallic or ceramic pad both work; semi-metallic handles heat well on a heavy SUV, ceramic runs cleaner and quieter. We carry Bendix semi-metallic front brake pads for the 2006-2010 Commander, and you can compare other options in our brake pads collection and brake rotors collection.

Rear brake job

The rear pads and rotors come off the same way as a normal disc brake, with one extra step: the parking brake shoes sit inside the rotor hat. When the rotor comes off, look at the shoes, springs and the star-wheel adjuster. If the shoes are worn, glazed, oil-soaked or cracked, replace them while you are there. If the parking brake is weak, re-adjust it; the shoes have no automatic adjuster, and they should be adjusted so they do not drag once the lever is released.

Parts worth doing at the same time

• New abutment clips and slide pin boots from a brake hardware kit, and clean, lubricated slide pins.
• A brake caliper if a piston is seized, a boot is torn, or the pad wear is badly uneven.
• Rubber brake hoses if they show cracks, scuffs or bulges. Jeep's manual warns worn hoses can burst and says to inspect brake hoses and lines at each oil change.
• Fresh brake fluid. The manual specifies Mopar DOT 3 brake fluid meeting SAE J1703, and allows DOT 4 if DOT 3 is not available.

How hard is the job

A front pad and rotor job on the Commander is rated an intermediate job of roughly one to two hours per axle by one Jeep parts specialist, a standard driveway job for someone with basic tools, a jack and stands, and a torque wrench. The front caliper and bracket come off to free the rotor. Torque the caliper bolts, bracket bolts and lug nuts to the values in the factory service manual; do not guess.

The rear takes longer because of the parking brake. Back the parking brake adjuster off if the rotor will not slide over the shoes, and plan time to set the adjustment correctly afterward. A rotor that has worn a lip at the hat, or rust between the rotor and hub, can also make removal slow on an older Commander from a salt state.

After any pad or rotor change, pump the pedal until it is firm before moving the vehicle, then bed in the new pads following the pad maker's instructions.

Inspection interval and one recall to check

The Commander maintenance schedule in the owner's manual calls for inspecting the brake linings every 12,000 miles or 12 months, and inspecting the brake hoses and lines at every oil change. Tire rotations happen at 6,000-mile intervals on the same schedule, which is the easiest time to look.

If you own a 2010 model, check for open recalls on your VIN. Chrysler recalled certain 2010 vehicles, including the Jeep Commander, because they may have been built with an improperly formed or missing brake booster input rod retaining clip. The remedy was a free replacement clip at a dealer.

Frequently Asked Questions

Do the front brakes on a Jeep Commander really wear out before the rears?

In normal driving, yes. The front axle does most of the braking on the Commander, so front pads usually need replacement well before the rears. A sticking rear caliper or dragging parking brake can reverse that, which is why both ends should be measured.

Does the 2006-2010 Commander have rear drum brakes?

No. It has rear disc brakes. The only drum-type part is the small parking brake shoe set inside the hat of each rear rotor, which is applied by the hand lever.

Are Commander brake parts the same as the Grand Cherokee?

The front pads, rear pads, rotors and parking brake shoes listed for the 2006-2010 Commander are shared with the 2005-2010 Grand Cherokee WK in parts catalogs. Always confirm fitment for your exact year before ordering.

Should I replace rotors every time I replace pads?

Not automatically. Replace rotors when they are below the minimum thickness stamped on them, grooved, lipped, heat-spotted, or causing pedal or steering vibration. On a heavy SUV with many miles, rotors often do need replacing by the second pad change.

What brake fluid does the Jeep Commander use?

Jeep specifies Mopar DOT 3 brake fluid meeting SAE J1703. DOT 4 is acceptable if DOT 3 is not available. Never let petroleum-based fluid into the brake system; it damages the seals.

Why does my Commander parking brake feel weak after a rear brake job?

The drum-in-hat shoes have no automatic adjuster, so they usually need to be adjusted after the rotors are replaced. Adjust them until they just contact, then back off until there is no drag, and confirm the lever holds the vehicle.

Sources

1. 2008 Jeep Commander Owner's Manual - DOT 3 SAE J1703 fluid, 12,000-mile lining inspection, hose checks, hand-lever parking brake, BAS and ABS description, trailer brake guidance, mud and sand brake inspection
2. Center for Auto Safety - 2010 Jeep Commander recalls - brake booster input rod retaining clip recall
3. Quadratec - Crown 52089269AB front rotor - front rotor fitment for Commander XK and Grand Cherokee WK, 23 lb shipping weight, 1-2 hour install rating
4. Quadratec Commander XK brake parts - front and rear disc pads, rotors and rear parking brake shoes shared with Grand Cherokee WK