Dorman - First Stop Drum Brake Wheel Cylinder P/N:W37851

Send firm hydraulic pressure to your rear drum shoes with the Dorman First Stop Drum Brake Wheel Cylinder, part number W37851. It drops in as a direct-fit rear wheel cylinder for the 1990-1993 Geo Storm (All engines), which uses two per axle — so plan on replacing both sides as a matched pair.

Mounted at the drum backing plate, a wheel cylinder converts brake-line hydraulic pressure into outward force that pushes the brake shoes against the drum. Dorman engineered this unit as a direct replacement built to drop in like the original cylinder on the listed applications, and it is manufactured and tested for quality assurance.

• Cast iron body: a cast iron housing forms the pressure bore.
• EPDM rubber cups and boots: made with high-quality EPDM rubber cups and boots for long-lasting performance.
• Surface-tested bore: the wheel cylinder bore is surface-tested to provide an optimum sealing surface for the pressure cups.
• Bleeder screw included: a bleeder screw is included; a bleeder screw cap is not included.
• Sizing: 0.625 in inside diameter with an M10 x 1.0 inlet thread (10 mm thread diameter, 1.0 pitch).

Signs a wheel cylinder may need replacing include brake fluid weeping at the backing plate, a soft or sinking pedal, or uneven rear braking; if a leaking or seized cylinder is the cause, this replaces it. Country of origin: China.

Interchange: 18E314 · 84-10007 · 8410007 · W906647 · 101-1176 · 1011176 · W-50007 · W50007 · 072-8739 · 0728739 · 34070 · 134.43007 · 135.43007 · WC14070 · 375-50000 · 37550000 · 94362829 · 8943628290 · 2037851 · WC37851 · F120218 · WC120218 · Manufacturer part number W37851.