Mercury Montego Brake Drum Guide: 1968-1976 Replacement and Selection
If your classic Montego's brakes feel weak or noisy, it might be time for new rear brake drums.
- For a 1968-1976 Montego, quality aftermarket brake drums are the industry standard, as new OEM parts are unavailable.
- Symptoms of failure include grinding noises, a vibrating pedal, and a weak parking brake.
- Always replace brake drums, shoes, and hardware in pairs to ensure safe, even braking.
- Before ordering, verify your car's specific drum diameter and width, as it can vary by year and model.
Is Your Montego Telling You It Needs New Brake Drums?
For a car as old as a 1968-1976 Mercury Montego, the brake system is critical for safety. The rear drum brakes do a lot of work, and when the drums wear out, you'll notice it. Ignoring these signs can lead to longer stopping distances or even brake failure.
Common Failure Symptoms
Pay attention to these signs that your brake drums are worn out or damaged:
- Scraping or Grinding Noises: A loud scraping sound when you brake usually means the brake shoes have worn down completely and metal is grinding against the inside of the drum. This damages the drum and should be fixed immediately.
- Vibrating Brake Pedal: If you feel a pulsing or shaking in the brake pedal, it could mean the drum is "out-of-round," meaning it's no longer perfectly circular. This causes the brake shoes to make uneven contact.
- Soft or Spongy Pedal: A brake pedal that feels soft or goes down further than usual can be a sign of worn drums. The brake shoes have to travel farther to make contact, resulting in a weak pedal feel.
- Weak Parking Brake: If your Montego rolls after you set the parking brake, it often means the rear drums and shoes are too worn to hold the car securely.
No Recalls, But Age is a Factor
Searches of the National Highway Traffic Safety Administration (NHTSA) database show no specific recalls or technical service bulletins (TSBs) for brake drums on the 1968-1976 Mercury Montego. However, due to the vehicle's age, all original brake components should be inspected regularly for wear and tear.
Choosing the Right Aftermarket Brake Drum
For a classic car like the Montego, finding brand-new original equipment (OEM) Ford parts is nearly impossible. The market relies on quality aftermarket brands. These parts are designed to meet or exceed the original factory specifications and are often your only option. Here’s a breakdown of available brands, from good to best.
| Brand Tier | Brands | Quality & Notes |
|---|---|---|
| Good (Economy) | Pronto, Dynamic Friction | These brands offer a budget-friendly solution that works for daily driving. Dynamic Friction drums are often coated for corrosion protection and balanced to prevent vibration. Forum users consider them a legitimate value option, though some note the finish quality can be average. |
| Better (Standard) | Centric | Centric is a major aftermarket manufacturer known for providing good quality parts for the money. They offer a solid balance of performance and price for most classic car owners. |
| Best (Premium) | Bendix, Raybestos | Bendix and Raybestos are long-standing brands with a reputation for quality and durability in the classic car community. Many mechanics and restorers prefer these brands for their reliability, though it's wise to check where they are manufactured, as quality can sometimes vary. |
Confirm Your Drum Size!
The Mercury Montego shared parts with the Ford Torino and Ranchero. Depending on the year, engine, and body style (sedan vs. wagon), your car could have 10-inch drums with different widths (like 2-inch, 2.25-inch, or 2.5-inch). Always measure your old drums or check your vehicle's service manual before ordering to ensure a perfect fit.
Frequently Asked Questions
Can I replace just one brake drum?
It is always recommended to replace brake drums in pairs (both rear wheels at the same time). This ensures even braking performance and prevents the car from pulling to one side when you stop. You should also install new brake shoes and hardware at the same time.
What does "out-of-round" mean?
An out-of-round drum is no longer perfectly circular. This can happen from heat and wear over time. It causes a pulsing or vibration when you brake because the brake shoes can't apply pressure evenly.
Are finned drums better?
Some replacement drums for the Montego are available with fins. These fins help dissipate heat more effectively, which can reduce brake fade during heavy or repeated use. For most street driving, standard smooth drums are perfectly adequate, but finned drums can be a slight performance upgrade.
Do I need to "turn" or machine new brake drums?
Generally, no. New aftermarket brake drums from reputable brands are machined and balanced at the factory, ready for installation. You should not need to machine them before fitting them to your car.
Technical Specifications
Common sizes for rear drums are 10 inches in diameter with a 5x4.5" bolt pattern. Widths vary between 2", 2.25", and 2.5" depending on the specific application.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.