Dorman W37255 Drum Brake Wheel Cylinder - Front Right Upper

Reliable Drum Brake Wheel Cylinder for Accurate Braking

The Dorman W37255 drum brake wheel cylinder is engineered to restore proper brake function in compatible vehicles. Designed with durable cast iron construction and precise dimensions, this component ensures consistent hydraulic pressure for safe stopping performance.

• Constructed from cast iron for strength and durability
• 1.25-inch bore diameter for accurate hydraulic operation
• Brake line inlet thread diameter of 0.437 inches
• Brake component inlet thread size: two 7/16-24 threads
• Does not include bleeder screw or bleeder screw cap
• Package contains one drum brake wheel cylinder

Detailed Product Description

The Dorman W37255 drum brake wheel cylinder is a critical component in the brake hydraulics system, designed to convert hydraulic pressure into mechanical force to push the brake shoes against the drum. Its cast iron casting material provides resistance to wear and corrosion, extending the service life of the part. The 1.25-inch bore diameter is engineered to match specific vehicle requirements, ensuring proper brake fluid displacement and pressure. The brake line inlet thread diameter of 0.437 inches and dual 7/16-24 brake component inlet threads allow for secure and leak-free connections to the brake lines. This wheel cylinder is compatible with various vehicle makes and models requiring these specifications, including certain Ford, Chevrolet, and Dodge trucks and SUVs. The part number W37255 should be referenced to confirm fitment with your specific vehicle model and year.

Common Applications and Issues Addressed

• Restores braking performance in vehicles with leaking or seized wheel cylinders
• Eliminates brake fluid leaks at the drum brake assembly
• Resolves uneven brake shoe wear caused by faulty hydraulic pressure
• Prevents brake drag and wheel lockup due to cylinder malfunction
• Improves overall brake system reliability and safety

Installation Notes and Tips

When installing the Dorman W37255 drum brake wheel cylinder, ensure the brake system is fully depressurized and the vehicle is securely supported. Clean the brake backing plate and inspect brake shoes for wear or damage before assembly. Use the correct brake line fittings matching the 0.437-inch inlet thread diameter and 7/16-24 thread size to avoid leaks. Bleeder screws are not included with this part, so retain or replace the existing bleeder screw as needed. After installation, bleed the brake system thoroughly to remove air and verify proper hydraulic pressure.

Quality Assurance and Warranty

Dorman manufactures the W37255 wheel cylinder to meet or exceed OEM specifications, using cast iron for durability and consistent performance. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in materials and workmanship. Refer to the product packaging or Dorman’s official documentation for exact warranty terms.