Standard/OEIn stock
$12.66
10 items in stock
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14-WC37778• Rear• Drum Brake Wheel Cylinder
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GeoBrakes carries OEM-grade drum brake wheel cylinders confirmed to fit the Pontiac Sunbird, the hydraulic actuators at the top of each drum brake assembly that convert brake fluid pressure into the mechanical force that pushes the Sunbird shoes against the drum. Available in new and remanufactured options for your Sunbird, every cylinder is bored to OEM specifications
Standard/OE$12.66
10 items in stock
Select your vehicle to see compatible products and accurate pricing
The drum brake wheel cylinder on the Pontiac Sunbird is the hydraulic component that actuates your Sunbird drum brake shoes every time you press the brake pedal. Brake fluid pressure from the master cylinder enters the Sunbird wheel cylinder and acts equally on two opposed pistons, pushing them outward simultaneously toward each shoe on the Pontiac Sunbird. A leaking Sunbird wheel cylinder actively bleeds hydraulic pressure from the brake circuit and contaminates the brake shoes with fluid, both of which directly compromise your ability to stop the Pontiac Sunbird.
Pontiac Sunbird drum brake wheel cylinders are particularly vulnerable to corrosion in American road salt conditions. Salt water penetrates the dust boots over time on the Sunbird, attacking the cylinder bore surface. Once the Pontiac Sunbird bore is pitted, new piston cup seals cannot maintain a leak-free seal. Internally corroded Sunbird cylinders must be replaced, not rebuilt. Vehicles in high-salt urban environments often require Sunbird wheel cylinder replacement on the same service interval as brake shoes.
GeoBrakes stocks both new OEM-specification wheel cylinders and quality remanufactured units for the Pontiac Sunbird. New cylinders are the stronger choice for Sunbird vehicles in high-corrosion environments. Remanufactured units offer excellent value for Pontiac Sunbird vehicles in moderate conditions where the original bore was sound. Our vehicle selector confirms the correct Sunbird cylinder, right bore diameter, port location, and mounting configuration, for your Sunbird drum brake assembly before purchase.
Can I drive my Pontiac Sunbird with a leaking wheel cylinder?
No. A leaking Sunbird cylinder actively loses hydraulic pressure from the brake circuit, reducing stopping force on your Pontiac Sunbird over time. Brake fluid that reaches the Sunbird shoes renders the friction material ineffective. A leaking Pontiac Sunbird wheel cylinder is an immediate safety concern that requires urgent attention.
Should I replace both wheel cylinders on my Pontiac Sunbird at the same time?
Yes. If one Sunbird cylinder has leaked or seized due to age and corrosion, the cylinder on the opposite side of the Pontiac Sunbird has experienced identical conditions and is at a similar stage of deterioration. Replacing both ensures balanced hydraulic pressure on your Sunbird and avoids a second service call within months.
Do I need to bleed the brakes on my Pontiac Sunbird after replacing a wheel cylinder?
Yes. Replacing a Sunbird wheel cylinder opens the hydraulic circuit, allowing air to enter. After installation on the Pontiac Sunbird, the entire rear brake circuit must be bled to remove all air and restore a firm, consistent brake pedal on your Sunbird.