DuraGo BD8870 Brake Drum - Rear

Overview of DuraGo BD8870 Brake Drum

The DuraGo BD8870 brake drum is engineered for reliable braking performance on select Buick, Cadillac, Chevrolet, Oldsmobile, and Pontiac vehicles. Designed with durable cast iron and a steel top, this brake drum meets the specifications required for models such as the Chevrolet Impala, Buick LeSabre, and Cadillac DeVille.

• Material: Cast iron with steel top construction
• Outside Diameter: 12.76 inches (324 mm)
• Nominal Drum Diameter: 11 inches (279.4 mm)
• Brake Surface Width: 2.45 inches (62.2 mm)
• Bolt Hole Quantity: 5 with 0.53 inch (13.5 mm) diameter
• Bolt Circle Diameter: 5 inches (127 mm)
• Center Hole Diameter: 3.06 inches (77.8 mm)
• Overall Height: 3.32 inches (84.3 mm)
• Composite construction for strength and durability

Detailed Product Description

The DuraGo BD8870 brake drum is constructed from cast iron with a steel top, providing a balance of strength and heat dissipation necessary for effective braking. Its composite construction enhances durability under typical driving conditions. The brake drum features a nominal diameter of 11 inches and an outside diameter of 12.76 inches, matching the original equipment specifications for various GM full-size and luxury models. With five bolt holes arranged on a 5-inch bolt circle diameter, this brake drum is compatible with multiple classic and late-model vehicles including the Chevrolet Caprice, Pontiac Bonneville, and Oldsmobile Delta 88.

Compatible Vehicles and Applications

This brake drum is compatible with the following makes and models:

• Buick: LeSabre, Riviera, Electra
• Cadillac: DeVille, Fleetwood, Brougham
• Chevrolet: Impala, Caprice, Bel Air, Commercial Chassis
• Oldsmobile: Delta 88, Custom Cruiser
• Pontiac: Bonneville, Catalina

Common Issues Addressed by DuraGo BD8870 Brake Drum

• Brake pulsation caused by warped or uneven drums
• Reduced braking efficiency due to worn or scored drum surfaces
• Excessive brake noise from damaged or out-of-spec drums
• Brake fade resulting from insufficient heat dissipation
• Fitment problems with incorrect drum dimensions or bolt patterns

Installation Notes and Tips

• Ensure the brake drum matches the vehicle’s OEM specifications before installation
• Inspect wheel bearings and replace if necessary during brake drum replacement
• Clean the mounting surface and check for rust or debris to ensure proper fit
• Torque lug nuts to manufacturer specifications to avoid drum distortion
• Check brake shoe clearance and adjust as needed after installation

Quality Assurance and Warranty

DuraGo brake drums are manufactured to meet or exceed industry standards for durability and performance. The BD8870 part number undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty details may vary, DuraGo typically offers limited warranties covering defects in materials and workmanship. Consult product documentation or the vehicle service manual for detailed warranty and maintenance information.