HomeBrake > Hardware, Fasteners and FittingsDorman W37851 Drum Brake Wheel Cylinder - Rear
Part #: W37851

Dorman W37851 Drum Brake Wheel Cylinder - Rear

Rear
4 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Geo, Storm
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Reliable Drum Brake Wheel Cylinder for Geo Storm

The Dorman W37851 drum brake wheel cylinder is engineered to restore proper braking function for your Geo Storm. Designed with durable cast iron construction and precise specifications, this component ensures consistent hydraulic pressure within the brake system.

  • Includes bleeder screw for easy brake fluid bleeding
  • Brake line inlet thread diameter: 10 mm
  • Brake component inlet thread size: M10 x 1.0 with 1.0 thread pitch
  • Bore diameter of 0.625 inches for accurate fitment
  • Constructed from cast iron for strength and durability
  • Package contains one drum brake wheel cylinder

Product Details and Specifications

The Dorman W37851 drum brake wheel cylinder is specifically designed for the Geo Storm, ensuring compatibility and reliable performance. Its cast iron casting material provides resistance to wear and corrosion, which is critical for brake hydraulics exposed to harsh conditions. The bore diameter of 0.625 inches matches OEM specifications, allowing for proper piston movement and hydraulic pressure control. The included bleeder screw simplifies maintenance by enabling efficient removal of air from the brake lines, although the bleeder screw cap is not included. Thread dimensions are standardized with a 10 mm brake line inlet diameter and M10 x 1.0 thread size with a 1.0 pitch, ensuring secure connections within the brake system.

Compatible Vehicles and Applications

This drum brake wheel cylinder is compatible with the Geo Storm, providing a direct replacement for worn or leaking wheel cylinders. It is suitable for addressing common brake hydraulic issues such as:

  • Brake fluid leaks at the wheel cylinder
  • Spongy or soft brake pedal feel
  • Uneven brake application or reduced braking efficiency
  • Brake drag caused by sticking pistons
  • Corrosion or damage to the original wheel cylinder

Installation Notes and Tips

When installing the Dorman W37851 wheel cylinder, ensure the brake system is properly bled to remove air and restore hydraulic pressure. Use the included bleeder screw to facilitate this process. Verify thread compatibility with your brake lines before installation. Inspect brake shoes and hardware for wear and replace as necessary to maintain optimal braking performance. Follow manufacturer torque specifications for all fittings to prevent leaks or damage.

Quality Assurance and Warranty

Dorman manufactures this drum brake wheel cylinder to meet or exceed OEM standards for fit, form, and function. The cast iron construction offers durability under typical operating conditions. While specific warranty details are not provided here, Dorman products generally come with a limited warranty against defects in material and workmanship. Consult product documentation or the manufacturer for exact warranty terms.

BrandDorman
Part NumberW37851
Bleeder Screw Cap IncludedNo
Bleeder Screw IncludedYes
Bore Diameter0.625
Brake Component Inlet Thread SizeM10 X 1.0
Brake Line Inlet Thread Diameter10
Casting MaterialCast Iron
Package Contents1 Drum Brake Wheel Cylinder
Thread Pitch1.0

This part fits 4 vehicles. Search below:

YearMakeModelPositionNotes
1993GeoStormRearCompatible with drum brake wheel cylinders featuring a 5/8" bore size.
1992GeoStormRearCompatible with drum brake wheel cylinders featuring a 5/8" bore size.
1991GeoStormRearCompatible with drum brake wheel cylinders featuring a 5/8" bore size.
1990GeoStormRearCompatible with drum brake wheel cylinders featuring a 5/8" 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:

072-8739134.4300718E31420378513407084-10007894362829094362829F120218W-50007W906647WC14070

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