PowerStop AR8644 Disc Brake Rotor - Rear

Reliable Rear Disc Brake Rotor for Chevrolet and GMC Trucks

The Power Stop AR8644 rear disc brake rotor is engineered to meet the exact specifications of Chevrolet and GMC heavy-duty trucks. Designed for vehicles such as the Silverado 2500 HD and Sierra 3500 HD, this rotor ensures consistent braking performance and durability under demanding conditions.

• Compatible with Chevrolet Avalanche 2500, Express 2500/3500, Savana 2500/3500, Sierra 1500/2500/3500, Silverado 2500/3500, Suburban 2500, and Yukon XL 2500
• Part number AR8644 for precise identification and fitment
• Vented disc design for improved heat dissipation
• Nominal thickness of 1.15 inches (29.20 mm) with discard thickness at 1.06 inches (27.00 mm)
• Outside diameter of 13.00 inches (330.00 mm) for proper fitment
• Mounting bolt hole circle diameter of 6.50 inches (165.10 mm) with 8 stud/lug holes
• Overall height of 3.60 inches (91.40 mm) to match OE specifications

About the Power Stop - Rear OE Stock Replacement Brake Rotor Line

The Power Stop - Rear OE Stock Replacement Brake Rotor line is designed to provide a direct replacement for original equipment rotors on rear axles. This product line focuses on maintaining factory specifications, ensuring compatibility and reliable braking performance for heavy-duty Chevrolet and GMC trucks. The AR8644 rotor is part of this line, offering a vented rotor design that supports heat management during extended braking.

Technical Details and Performance

This disc brake rotor features a vented design that helps dissipate heat more effectively than solid rotors, reducing the risk of brake fade during heavy use. The nominal thickness of 1.15 inches (29.20 mm) ensures structural integrity, while the discard thickness of 1.06 inches (27.00 mm) indicates the minimum safe thickness before replacement is necessary. With an outside diameter of 13.00 inches (330.00 mm) and an overall height of 3.60 inches (91.40 mm), the AR8644 rotor matches the original equipment dimensions for a precise fit on compatible Chevrolet and GMC models.

Common Applications and Problem Solving

• Replacement for worn or warped rear brake rotors on Chevrolet Silverado 2500 HD and GMC Sierra 3500 HD
• Addresses brake pulsation and vibration issues caused by uneven rotor surfaces
• Restores braking efficiency lost due to rotor thinning or damage
• Helps eliminate noise and squealing associated with damaged rotors
• Supports safe towing and heavy load braking demands on trucks like the Chevrolet Avalanche 2500 and GMC Yukon XL 2500

Installation Notes and Tips

Ensure the vehicle is securely lifted and supported before beginning installation. Remove the wheel and caliper assembly to access the rear rotor. Clean the hub surface to remove rust and debris for proper rotor seating. Verify the rotor thickness before installation to confirm it meets or exceeds the discard thickness. Torque all mounting bolts to manufacturer specifications. It is recommended to inspect brake pads and replace them if worn to maintain optimal braking performance.

Quality Assurance and Warranty

The Power Stop AR8644 rotor is manufactured to meet or exceed OEM standards for fit, form, and function. While this product does not include a rust-resistant coating, it is engineered for durability under normal operating conditions. Power Stop provides a limited warranty against defects in materials and workmanship, ensuring confidence in the product's reliability for Chevrolet and GMC rear brake applications.