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Dorman W45999 Drum Brake Wheel Cylinder - RearOE Quality 60-Day Returns
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Part #: W45999

Dorman W45999 Drum Brake Wheel Cylinder - Rear

Rear
⚙️ 54 vehicles fit this part
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🚗Fitment: Chevrolet, Pontiac, Buick, and Oldsmobile, Camaro, Firebird, Skylark, Nova, Omega, Phoenix, Ventura, Chevelle, El Camino, 442, Cutlass, F85, Special, Sportwagon, Malibu, Gran Sport, Jetstar 88, GTO, LeMans, and Tempest
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Reliable Drum Brake Wheel Cylinder for Classic GM Vehicles

The Dorman W45999 drum brake wheel cylinder is engineered to restore braking performance on select Buick, Chevrolet, Oldsmobile, and Pontiac models. Designed with durable cast iron construction and a precise 0.938-inch bore diameter, this wheel cylinder ensures consistent hydraulic pressure for safe stopping power.

  • Includes bleeder screw for easy brake system bleeding
  • Constructed from cast iron for strength and longevity
  • 0.938-inch bore diameter for accurate fit and function
  • Brake component inlet thread size: 3/8-24 inches
  • Thread diameter: 3/8 inch
  • Package contains one drum brake wheel cylinder

Durable Construction and Precise Specifications

The Dorman W45999 wheel cylinder features a cast iron casting material that provides resistance to wear and corrosion, essential for maintaining brake system integrity over time. Its 0.938-inch bore diameter is designed to match original equipment specifications, ensuring proper hydraulic pressure and smooth brake operation. The included bleeder screw simplifies maintenance by allowing trapped air to be released from the brake lines, improving brake responsiveness. Thread sizes of 3/8-24 inches for the brake component inlet and 3/8 inch for the thread diameter ensure compatibility with factory brake lines and fittings.

Compatible With Select Buick, Chevrolet, Oldsmobile, and Pontiac Models

This drum brake wheel cylinder is compatible with a range of classic GM vehicles, including the Chevrolet Camaro, El Camino, Malibu, and Nova; Buick Skylark and Riviera; Oldsmobile Cutlass, Omega, and 442; Pontiac Firebird, GTO, LeMans, Phoenix, and Tempest. The Dorman W45999 part number is designed to meet the specific hydraulic requirements of these models, making it a suitable replacement for worn or leaking wheel cylinders.

Common Brake Issues Addressed by This Wheel Cylinder

  • Brake fluid leaks from the wheel cylinder
  • Spongy or unresponsive brake pedal
  • Uneven brake application or pulling to one side
  • Brake noise or reduced stopping power
  • Corroded or damaged wheel cylinder components

Installation Notes and Tips

When installing the Dorman W45999 drum brake wheel cylinder, ensure the brake system is fully depressurized and the vehicle is securely supported. Use the included bleeder screw to properly bleed the brake lines after installation to remove any air pockets. Verify thread compatibility with existing brake lines before assembly. It is recommended to inspect brake shoes and hardware during installation and replace any worn components to maintain optimal braking performance.

Quality Assurance and Warranty Information

Dorman manufactures the W45999 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, providing coverage against defects in material and workmanship under normal use conditions.

BrandDorman
Part NumberW45999
Bleeder Screw Cap IncludedNo
Bleeder Screw IncludedYes
Bore Diameter0.938
Brake Component Inlet Thread Size3/8-24 in
Casting MaterialCast Iron
Package Contents1 Drum Brake Wheel Cylinder
Thread Diameter3/8

This part fits 54 vehicles. Search below:

YearMakeModelPositionNotes
1981ChevroletCamaroRearFits 15/16" bore size drum brakes on multiple vehicle models.
1981PontiacFirebirdRearFits 15/16" bore size drum brakes on multiple vehicle models.
1980ChevroletCamaroRearFits 15/16" bore size drum brakes on multiple vehicle models.
1980PontiacFirebirdRearFits 15/16" bore size drum brakes on multiple vehicle models.
1979BuickSkylarkRearFits 15/16" bore size drum brakes on multiple vehicle models.
1979ChevroletCamaroRearFits 15/16" bore size drum brakes on multiple vehicle models.
1979ChevroletNovaRearFits 15/16" bore size drum brakes on multiple vehicle models.
1979OldsmobileOmegaRearFitment Note: 15/16" bore size, compatible with 9.50" x 2" brakes.
1979PontiacFirebirdRearFits 15/16" bore size drum brakes on multiple vehicle models.
1979PontiacPhoenixRearFits 15/16" bore size drum brakes on multiple vehicle models.
1978BuickSkylarkRearFits 15/16" bore size drum brakes on multiple vehicle models.
1978ChevroletCamaroRearFits 15/16" bore size drum brakes on multiple vehicle models.
1978ChevroletNovaRearFits 15/16" bore size drum brakes on multiple vehicle models.
1978OldsmobileOmegaRearFitment Note: 15/16" bore size, compatible with 9.50" x 2" brakes.
1978PontiacFirebirdRearFits 15/16" bore size drum brakes on multiple vehicle models.
1978PontiacPhoenixRearFitment Note: 15/16" bore size, compatible with 9.50" x 2" brakes.
1977BuickSkylarkRearFits 15/16" bore size drum brakes on multiple vehicle models.
1977ChevroletCamaroRearFits 15/16" bore size drum brakes on multiple vehicle models.
1977ChevroletNovaRearFits 15/16" bore size drum brakes on multiple vehicle models.
1977OldsmobileOmegaRearFitment Note: 15/16" bore size, compatible with 9.50" x 2" brakes.
1977PontiacFirebirdRearFits 15/16" bore size drum brakes on multiple vehicle models.
1977PontiacPhoenixRearFitment Note: 15/16" bore size, compatible with 9.50" x 2" brakes.
1976BuickSkylarkRearFits 15/16" bore size drum brakes on multiple vehicle models.
1976ChevroletCamaroRearFits 15/16" bore size drum brakes on multiple vehicle models.
1976ChevroletNovaRearFits 15/16" bore size drum brakes on multiple vehicle models.
1976OldsmobileOmegaRearFitment Note: 15/16" bore size, compatible with 9.50" x 2" brakes.
1976PontiacFirebirdRearFits 15/16" bore size drum brakes on multiple vehicle models.
1975ChevroletCamaroRearFits 15/16" bore size drum brakes on multiple vehicle models.
1969ChevroletEl CaminoRearFits 15/16" bore size drum brakes on multiple vehicle models.
1969OldsmobileCutlassRearFits 15/16" bore size drum brakes on multiple vehicle models.
1968ChevroletEl CaminoRearFits 15/16" bore size drum brakes on multiple vehicle models.
1968OldsmobileCutlassRearFits 15/16" bore size drum brakes on multiple vehicle models.
1967BuickSkylarkRearFits 15/16" bore size drum brakes on multiple vehicle models.
1967ChevroletEl CaminoRearFits 15/16" bore size drum brakes on multiple vehicle models.
1967ChevroletMalibuRearFits 15/16" bore size drum brakes on multiple vehicle models.
1966BuickSkylarkRearFits 15/16" bore size drum brakes on multiple vehicle models.
1966ChevroletEl CaminoRearFits 15/16" bore size drum brakes on multiple vehicle models.
1966ChevroletMalibuRearFits 15/16" bore size drum brakes on multiple vehicle models.
1966OldsmobileCutlassRearFits 15/16" bore size drum brakes on multiple vehicle models.
1966PontiacGTORearFits 15/16" bore size drum brakes on multiple vehicle models.
1966PontiacLeMansRearFits 15/16" bore size drum brakes on multiple vehicle models.
1966PontiacTempestRearFits 15/16" bore size drum brakes on multiple vehicle models.
1965BuickSkylarkRearFits 15/16" bore size drum brakes on multiple vehicle models.
1965ChevroletEl CaminoRearFits 15/16" bore size drum brakes on multiple vehicle models.
1965ChevroletMalibuRearFits 15/16" bore size drum brakes on multiple vehicle models.
1965OldsmobileCutlassRearFits 15/16" bore size drum brakes on multiple vehicle models.
1965PontiacGTORearFits 15/16" bore size drum brakes on multiple vehicle models.
1965PontiacLeMansRearFits 15/16" bore size drum brakes on multiple vehicle models.
1965PontiacTempestRearFits 15/16" bore size drum brakes on multiple vehicle models.
1964ChevroletEl CaminoRearFits 15/16" bore size drum brakes on multiple vehicle models.
1964OldsmobileCutlassRearFits 15/16" bore size drum brakes on multiple vehicle models.
1964PontiacGTORearFits 15/16" bore size drum brakes on multiple vehicle models.
1964PontiacLeMansRearFits 15/16" bore size drum brakes on multiple vehicle models.
1964PontiacTempestRearFits 15/16" bore size drum brakes on multiple vehicle models.

* 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:

134.630021800488918E49203702133311784-32002F45999W-83002W906207WC13311

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

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