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Dorman W37784 Drum Brake Wheel Cylinder - Rear
Reliable Drum Brake Wheel Cylinder for Chevrolet and GMC Trucks
The Dorman W37784 drum brake wheel cylinder is engineered to restore proper braking function for Chevrolet C1500 and GMC K1500 models. Designed with durable cast iron construction, this wheel cylinder ensures consistent performance and longevity in your vehicle's brake hydraulics system.
- Includes bleeder screw for easy brake fluid bleeding
- Constructed from cast iron for strength and durability
- 1.125 inch bore diameter for precise fit and function
- Brake component inlet thread size of 3/8-24 inches
- Thread diameter of 3/8 inch for secure installation
- Package contains one drum brake wheel cylinder
Durable Construction and Precise Specifications
The Dorman W37784 wheel cylinder features a cast iron casting material that provides resistance to wear and corrosion, essential for maintaining brake system integrity. Its 1.125 inch bore diameter is designed to match the original equipment specifications for Chevrolet C1500 and GMC K1500 trucks, ensuring reliable hydraulic pressure application. The included bleeder screw simplifies maintenance by allowing efficient removal of air from the brake lines, although a bleeder screw cap is not included. Thread sizes of 3/8-24 inches for the brake component inlet and 3/8 inch for the thread diameter guarantee compatibility with existing brake hardware.
Compatible Vehicles and Applications
This drum brake wheel cylinder is compatible with the following vehicles:
- Chevrolet C1500
- GMC K1500
It is designed specifically for use in the brake hydraulics system to replace worn or leaking wheel cylinders, restoring proper brake function and safety.
Common Issues Addressed by the W37784 Wheel Cylinder
- Brake fluid leaks at the wheel cylinder
- Reduced braking efficiency due to worn seals
- Spongy or soft brake pedal feel
- Uneven brake shoe wear
- Brake drag caused by sticking pistons
Installation Notes and Tips
When installing the Dorman W37784 drum brake wheel cylinder, ensure the brake system is properly bled to remove air pockets using the included bleeder screw. Verify thread compatibility with your vehicle’s brake lines and hardware. It is recommended to inspect brake shoes and drums for wear during installation and replace if necessary to maintain optimal braking performance.
Quality Assurance and Warranty
Dorman parts are manufactured to meet or exceed OEM standards, providing reliable performance for your Chevrolet C1500 or GMC K1500. The W37784 wheel cylinder is backed by Dorman’s quality assurance processes. Please refer to Dorman’s official warranty policy for specific coverage details.
| Brand | Dorman |
|---|---|
| Part Number | W37784 |
| Bleeder Screw Cap Included | No |
| Bleeder Screw Included | Yes |
| Bore Diameter | 1.125 |
| Brake Component Inlet Thread Size | 3/8-24 in |
| Casting Material | Cast Iron |
| Package Contents | 1 Drum Brake Wheel Cylinder |
| Thread Diameter | 3/8 |
This part fits 16 vehicles. Search below:
| Year | Make | Model | Body Type | Position | Notes |
|---|---|---|---|---|---|
| 1991 | Chevrolet | C1500 | Standard Cab Pickup | Rear | For vehicles without heavy duty chassis, drum brake wheel cylinder kit with a 1.125 inch bore size. |
| 1991 | Chevrolet | K1500 | Standard Cab Pickup | Rear | 1.125 In. Bore, with Standard Suspension |
| 1991 | GMC | C1500 | Standard Cab Pickup | Rear | For vehicles without heavy duty chassis, drum brake wheel cylinder kit with a 1.125 inch bore size. |
| 1991 | GMC | K1500 | Standard Cab Pickup | Rear | 1.125 In. Bore, with Standard Suspension |
| 1990 | Chevrolet | C1500 | Standard Cab Pickup | Rear | For vehicles without heavy duty chassis, drum brake wheel cylinder kit with a 1.125 inch bore size. |
| 1990 | Chevrolet | K1500 | Standard Cab Pickup | Rear | 1.125 In. Bore, with Standard Suspension |
| 1990 | GMC | C1500 | Standard Cab Pickup | Rear | For vehicles without heavy duty chassis, drum brake wheel cylinder kit with a 1.125 inch bore size. |
| 1990 | GMC | K1500 | Standard Cab Pickup | Rear | 1.125 In. Bore, with Standard Suspension |
| 1989 | Chevrolet | C1500 | Standard Cab Pickup | Rear | For vehicles without heavy duty chassis, drum brake wheel cylinder kit with a 1.125 inch bore size. |
| 1989 | Chevrolet | K1500 | Standard Cab Pickup | Rear | Bore: 1.125 In.; w/RPO Code JB3 (Power Brakes, Vacuum Boosted, Front Disc, Rear Drum) |
| 1989 | GMC | C1500 | Standard Cab Pickup | Rear | For vehicles without heavy duty chassis, drum brake wheel cylinder kit with a 1.125 inch bore size. |
| 1989 | GMC | K1500 | Standard Cab Pickup | Rear | Bore: 1.125 In.; w/RPO Code JB3 (Power Brakes, Vacuum Boosted, Front Disc, Rear Drum) |
| 1988 | Chevrolet | C1500 | Standard Cab Pickup | Rear | For vehicles without heavy duty chassis, drum brake wheel cylinder kit with a 1.125 inch bore size. |
| 1988 | Chevrolet | K1500 | Standard Cab Pickup | Rear | 1.125 In. Bore, with Standard Suspension |
| 1988 | GMC | C1500 | Standard Cab Pickup | Rear | For vehicles without heavy duty chassis, drum brake wheel cylinder kit with a 1.125 inch bore size. |
| 1988 | GMC | K1500 | Standard Cab Pickup | Rear | 1.125 In. Bore, with Standard Suspension |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.