Dorman W37391 Drum Brake Wheel Cylinder - Rear

Reliable Drum Brake Wheel Cylinder for Accurate Brake Performance

The Dorman W37391 drum brake wheel cylinder is engineered to restore proper brake hydraulics in compatible vehicles. Designed with durable cast iron and a precise 0.688-inch bore diameter, this wheel cylinder ensures consistent braking force and fluid control for safe stopping.

• Includes bleeder screw for easy brake fluid bleeding
• Constructed from cast iron for strength and longevity
• 0.688-inch bore diameter for accurate hydraulic pressure
• Brake component inlet thread size of 3/8-24 inches
• Thread diameter of 3/8 inch for secure fitting
• Package contains one drum brake wheel cylinder (part number W37391)

Durable Construction and Precise Specifications

The Dorman W37391 wheel cylinder is made from cast iron, providing a robust casting material that withstands the rigors of brake system pressure and heat. Its 0.688-inch bore diameter is designed to match specific vehicle requirements, ensuring proper hydraulic function. The included bleeder screw simplifies maintenance by allowing trapped air to be released from the brake lines, improving brake responsiveness. The 3/8-24 inch brake component inlet thread size and 3/8 inch thread diameter ensure compatibility with standard brake line fittings.

Compatible Vehicles and Common Applications

This drum brake wheel cylinder is compatible with various makes and models that require a 0.688-inch bore diameter and 3/8-24 inch inlet thread size. It is commonly used in vehicles where the original equipment manufacturer specifies these dimensions for rear drum brake systems. The Dorman W37391 is suitable for restoring brake hydraulics in older trucks, SUVs, and passenger cars that utilize drum brakes.

Common Brake Issues Addressed by This Wheel Cylinder

• Brake fluid leaks from worn or damaged wheel cylinders
• Reduced braking efficiency due to internal cylinder corrosion
• Spongy brake pedal caused by air in the brake lines
• Uneven brake shoe wear from inconsistent hydraulic pressure
• Brake drag or sticking caused by seized wheel cylinder pistons

Installation Notes and Tips

When installing the Dorman W37391 drum brake wheel cylinder, ensure the brake system is fully depressurized and the vehicle is securely lifted. Use the included bleeder screw to properly bleed the brake lines after installation to remove any trapped air. Verify that the 3/8-24 inch inlet thread size matches the brake line fittings on your vehicle. Inspect brake shoes and hardware for wear and replace as necessary to maintain optimal braking performance.

Quality Assurance and Warranty Information

Dorman manufactures the W37391 wheel cylinder to meet or exceed OEM specifications, using cast iron for durability and reliable performance. This part undergoes quality control inspections to ensure proper fit and function. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in materials and workmanship to provide confidence in your purchase.