DuraGo BD8986 Brake Drum - Rear

Durable Brake Drum for Chevrolet and GMC Vehicles

The DuraGo BD8986 brake drum is engineered to provide reliable braking performance for select Chevrolet and GMC models. Designed with a composite construction featuring cast iron and a steel top, this brake drum supports consistent stopping power and durability.

• Composite construction with cast iron and steel top for strength
• Outside diameter of 13.48 inches (342.4 mm) for precise fitment
• Brake surface width of 3.31 inches (84 mm) to ensure effective braking contact
• Includes outer cooling fins to help dissipate heat during operation
• Five bolt holes with a 5-inch (127 mm) bolt circle diameter for secure mounting
• Nominal drum diameter of 11.15 inches (283.3 mm) with a maximum discard diameter of 11.21 inches (284.7 mm)
• Center hole diameter of 3.1 inches (78.7 mm) for proper alignment

Technical Details and Construction

The DuraGo BD8986 brake drum features a composite design combining cast iron with a steel top layer, providing a balance of durability and heat resistance. The inclusion of outer cooling fins enhances heat dissipation, which is critical for maintaining braking efficiency and reducing the risk of brake fade. This brake drum does not include a rust-resistant coating or an ABS tone ring, so it is important to consider environmental conditions and vehicle ABS compatibility when selecting this part.

Compatible Vehicles and Fitment

This brake drum is compatible with Chevrolet G10, G20, and GMC R1500 Suburban models. The precise bolt hole configuration—five holes with a 5-inch bolt circle diameter—and the specified dimensions ensure a proper fit for these vehicles. The part number BD8986 should be referenced to confirm compatibility with your specific model year and brake system.

Common Applications and Problem Resolution

• Replacement for worn or scored brake drums on Chevrolet G10 and G20 vans
• Restores braking performance on GMC R1500 Suburban models experiencing brake noise or vibration
• Addresses brake fade caused by overheating through enhanced cooling fins
• Corrects uneven braking due to out-of-spec drum diameter or surface wear
• Provides a reliable option for brake system maintenance and safety compliance

Installation Notes and Tips

When installing the DuraGo BD8986 brake drum, ensure the brake shoes and hardware are inspected and replaced if necessary to maintain optimal braking performance. Verify the drum’s dimensions against the vehicle’s specifications, especially the maximum discard diameter, to confirm suitability. Proper cleaning of the mounting surface and lubrication of contact points can facilitate installation and prevent premature wear.

Quality Assurance and Warranty

DuraGo brake drums are manufactured to meet industry standards for material quality and dimensional accuracy. While this product does not include a rust-resistant coating, its composite construction supports durability under normal operating conditions. Please consult the product documentation or manufacturer for specific warranty details related to the BD8986 brake drum.