DuraGo BD8939 Brake Drum - Rear

Durable DuraGo BD8939 Brake Drum for Select GM Vehicles

The DuraGo BD8939 brake drum is engineered to provide reliable braking performance for a range of Buick, Cadillac, Chevrolet, Oldsmobile, and Pontiac models. Designed with composite construction and cast iron material, this brake drum offers consistent durability and heat dissipation for everyday driving conditions.

• Constructed from cast iron with a steel top for strength and longevity
• Composite construction with outer cooling fins to enhance heat dissipation
• Nominal drum diameter of 223.5 mm (8.8 inches) with a maximum discard diameter of 226.3 mm (8.91 inches)
• Five bolt holes with a bolt circle diameter of 114.3 mm (4.5 inches)
• Brake surface width of 54.4 mm (2.14 inches) for effective braking contact
• Center hole diameter of 70.6 mm (2.78 inches) for precise fitment

This brake drum is designed specifically for compatibility with various GM vehicles including Buick LeSabre, Cadillac DeVille, Chevrolet Malibu, Oldsmobile Cutlass, and Pontiac Grand Am among others. The BD8939 part number ensures exact replacement fitment, maintaining factory specifications for brake diameter, bolt pattern, and overall height of 70 mm (2.76 inches). The inclusion of outer cooling fins helps reduce heat buildup during braking, which can improve brake life and performance under normal driving conditions.

Compatible Vehicles and Applications

The DuraGo BD8939 brake drum is compatible with multiple GM makes and models, including:

• Buick: Century, LeSabre, Park Avenue, Regal
• Cadillac: DeVille, Fleetwood
• Chevrolet: Malibu, Monte Carlo, Lumina, Montana
• Oldsmobile: Cutlass, Cutlass Ciera, Cutlass Cruiser, Delta 88
• Pontiac: Grand Am, Bonneville, Trans Sport, Silhouette

Common Issues Addressed by the BD8939 Brake Drum

• Brake noise or vibration caused by worn or warped drums
• Reduced braking efficiency due to surface wear or scoring
• Brake fade from excessive heat buildup during prolonged use
• Uneven brake pad wear resulting from damaged drums
• Corrosion or structural damage compromising brake safety

Installation Notes and Tips

• Ensure the brake drum matches the vehicle’s bolt pattern and diameter before installation
• Inspect brake shoes and hardware for wear and replace as necessary during drum installation
• Clean the hub surface and apply anti-seize compound to prevent future corrosion
• Check for proper drum runout to avoid brake pulsation
• Follow manufacturer torque specifications for lug nuts and bolts

Quality Assurance and Warranty

The DuraGo BD8939 brake drum is manufactured to meet or exceed OEM standards for material quality and dimensional accuracy. While this product does not include a rust-resistant coating, its composite construction and cooling fins contribute to durability and heat management. Warranty coverage details should be confirmed with the distributor or retailer at the time of purchase.