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Dorman W34475 Drum Brake Wheel Cylinder - Rear Left or Rear Right
Reliable Drum Brake Wheel Cylinder for Cadillac, Chevrolet, and Jeep
The Dorman W34475 drum brake wheel cylinder is engineered to restore proper braking function for select Cadillac, Chevrolet, and Jeep models. Designed with durable cast iron construction and precise dimensions, this wheel cylinder ensures consistent hydraulic pressure and reliable performance.
- Includes bleeder screw for easy brake bleeding
- Cast iron casting material for strength and durability
- 1.125 inch bore diameter for accurate fit and function
- Brake line inlet thread diameter of 0.437 inches (7/16-24 thread size)
- Package contains one drum brake wheel cylinder
Detailed Product Features and Specifications
The Dorman W34475 wheel cylinder is specifically designed for drum brake systems on vehicles such as the Cadillac Fleetwood, Chevrolet C20 Suburban, J20, K20 Suburban, and Jeep Commercial Chassis. Its cast iron construction provides resistance to wear and corrosion, ensuring long service life under demanding conditions. The 1.125 inch bore diameter matches OEM specifications for proper hydraulic pressure and brake shoe actuation. The included bleeder screw simplifies maintenance by allowing air to be purged from the brake lines, although a bleeder screw cap is not included. The brake line inlet thread size of 7/16-24 (0.437 inch diameter) ensures compatibility with factory brake lines for a secure connection.
Compatible Vehicles and Applications
- Cadillac Fleetwood drum brake systems
- Chevrolet C20 Suburban and K20 Suburban models
- Chevrolet J20 and Commercial Chassis vehicles
- Jeep Commercial Chassis brake hydraulics
Common Issues Addressed by This Wheel Cylinder
- Brake fluid leaks from worn or damaged wheel cylinders
- Reduced braking efficiency due to cylinder bore wear
- Spongy brake pedal caused by air in brake lines
- Uneven brake shoe application leading to premature wear
- Corrosion-related failure of original wheel cylinder components
Installation Notes and Tips
When installing the Dorman W34475 drum brake wheel cylinder, ensure the brake system is fully depressurized and the vehicle is securely supported. Clean the backing plate and brake shoe contact points before installation. Use the included bleeder screw to properly bleed the brake system after installation to remove any trapped air. Verify that the brake line inlet threads match the factory brake lines to avoid leaks. It is recommended to inspect and replace brake shoes and hardware as needed during installation for optimal braking performance.
Quality Assurance and Warranty Information
Dorman manufactures the W34475 wheel cylinder to meet or exceed OEM standards for fit, form, and function. The cast iron construction and precise machining contribute to reliable brake system operation. This part is backed by Dorman's limited warranty, which covers defects in material and workmanship under normal use. Refer to Dorman's warranty policy for specific terms and conditions.
| Brand | Dorman |
| Part Number | W34475 |
| Bleeder Screw Cap Included | No |
| Bleeder Screw Included | Yes |
| Bore Diameter | 1.125 |
| Brake Component Inlet Thread Size | 7/16-24 |
| Brake Line Inlet Thread Diameter | 0.437 |
| Casting Material | Cast Iron |
| Package Contents | 1 Drum Brake Wheel Cylinder |
This part fits 31 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1975 | Jeep | J20 | Rear Left | Mod. 46; Bore: 1.125 In. | ||
| 1974 | Jeep | J20 | Rear Left | Mod. 46; 1.125 In. Bore; Front Drum Brakes | ||
| 1972 | Chevrolet | C20 Suburban | Rear Right | Compatible with drum brake systems with a 1.125" bore size. | ||
| 1971 | Chevrolet | C20 Suburban | Rear Right | Bore: 1.125 In.; Rear Leaf Springs | ||
| 1971 | Chevrolet | K20 Suburban | Rear Right | Compatible with drum brake systems with a 1.125" bore size. | ||
| 1971 | GMC | G35/G3500 Van | Rear Right | Compatible with drum brake systems with a 1.125" bore size. | ||
| 1970 | Chevrolet | K20 Suburban | Rear Right | Compatible with drum brake systems with a 1.125" bore size. | ||
| 1969 | Chevrolet | C20 Suburban | 4.1L | L6 | Rear Right | 1.125" bore for rear leaf springs with a 133.0" wheelbase. |
| 1969 | Chevrolet | C20 Suburban | 5.0L | V8 | Rear Right | 1.125" bore for rear leaf springs with a 133.0" wheelbase. |
| 1969 | Chevrolet | C20 Suburban | 6.5L | V8 | Rear Right | Compatible with drum brake systems with a 1.125" bore size. |
| 1969 | Chevrolet | C20 Suburban | 4.8L | L6 | Rear Right | 1.125" bore for rear leaf springs with a 133.0" wheelbase. |
| 1969 | Chevrolet | C20 Suburban | 5.3L | V8 | Rear Right | Bore: 1.125 In.; 133.0 Inch Wheelbase |
| 1969 | Chevrolet | C20 Suburban | 5.7L | V8 | Rear Right | 1.125" bore for rear leaf springs with a 133.0" wheelbase. |
| 1969 | Chevrolet | K20 Suburban | Rear Right | Compatible with drum brake systems with a 1.125" bore size. | ||
| 1968 | Cadillac | Commercial Chassis | Rear Right | Compatible with drum brake systems with a 1.125" bore size. | ||
| 1968 | Cadillac | Fleetwood | Rear Right | Commercial Chassis with Bore size of 1.125 In. | ||
| 1968 | Chevrolet | C20 Suburban | 4.1L | L6 | Rear Right | 1.125" bore for rear leaf springs with a 133.0" wheelbase. |
| 1968 | Chevrolet | C20 Suburban | 4.8L | L6 | Rear Right | 1.125" bore for rear leaf springs with a 133.0" wheelbase. |
| 1968 | Chevrolet | C20 Suburban | 5.0L | V8 | Rear Right | 1.125" bore for rear leaf springs with a 133.0" wheelbase. |
| 1968 | Chevrolet | C20 Suburban | 5.3L | V8 | Rear Right | 1.125" bore for rear leaf springs with a 133.0" wheelbase. |
| 1968 | Chevrolet | C20 Suburban | 6.5L | V8 | Rear Right | Compatible with drum brake systems with a 1.125" bore size. |
| 1968 | Chevrolet | K20 Suburban | Rear Right | Compatible with drum brake systems with a 1.125" bore size. | ||
| 1967 | Cadillac | Commercial Chassis | Rear Right | Compatible with drum brake systems with a 1.125" bore size. | ||
| 1967 | Chevrolet | C20 Suburban | Rear Left | Bore: 1.125 In.; Rear Leaf Springs | ||
| 1967 | Chevrolet | K20 Suburban | Rear Right | Compatible with drum brake systems with a 1.125" bore size. | ||
| 1966 | Cadillac | Commercial Chassis | Rear Right | Compatible with drum brake systems with a 1.125" bore size. | ||
| 1965 | Cadillac | Commercial Chassis | Rear Right | Compatible with drum brake systems with a 1.125" bore size. | ||
| 1964 | Cadillac | Commercial Chassis | Rear Right | Compatible with drum brake systems with a 1.125" bore size. | ||
| 1963 | Cadillac | Commercial Chassis | Rear Right | Compatible with drum brake systems with a 1.125" bore size. | ||
| 1962 | Cadillac | Commercial Chassis | Rear Right | Compatible with drum brake systems with a 1.125" bore size. | ||
| 1960 | Cadillac | Commercial Chassis | Rear Right | Compatible with drum brake systems with a 1.125" bore size. |
* 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.