Standard/OEIn stock
$15.59
10 items in stock
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14-WC370190• Rear• Drum Brake Wheel Cylinder
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GeoBrakes carries OEM-grade drum brake wheel cylinders confirmed to fit the Pontiac Trans Sport, the hydraulic actuators at the top of each drum brake assembly that convert brake fluid pressure into the mechanical force that pushes the Trans Sport shoes against the drum. Available in new and remanufactured options for your Trans Sport, every cylinder is bored to OEM specifications
Standard/OE$15.59
10 items in stock
Select your vehicle to see compatible products and accurate pricing
The drum brake wheel cylinder on the Pontiac Trans Sport is the hydraulic component that actuates your Trans Sport drum brake shoes every time you press the brake pedal. Brake fluid pressure from the master cylinder enters the Trans Sport wheel cylinder and acts equally on two opposed pistons, pushing them outward simultaneously toward each shoe on the Pontiac Trans Sport. A leaking Trans Sport 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 Trans Sport.
Pontiac Trans Sport drum brake wheel cylinders are particularly vulnerable to corrosion in American road salt conditions. Salt water penetrates the dust boots over time on the Trans Sport, attacking the cylinder bore surface. Once the Pontiac Trans Sport bore is pitted, new piston cup seals cannot maintain a leak-free seal. Internally corroded Trans Sport cylinders must be replaced, not rebuilt. Vehicles in high-salt urban environments often require Trans Sport 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 Trans Sport. New cylinders are the stronger choice for Trans Sport vehicles in high-corrosion environments. Remanufactured units offer excellent value for Pontiac Trans Sport vehicles in moderate conditions where the original bore was sound. Our vehicle selector confirms the correct Trans Sport cylinder, right bore diameter, port location, and mounting configuration, for your Trans Sport drum brake assembly before purchase.
Can I drive my Pontiac Trans Sport with a leaking wheel cylinder?
No. A leaking Trans Sport cylinder actively loses hydraulic pressure from the brake circuit, reducing stopping force on your Pontiac Trans Sport over time. Brake fluid that reaches the Trans Sport shoes renders the friction material ineffective. A leaking Pontiac Trans Sport wheel cylinder is an immediate safety concern that requires urgent attention.
Should I replace both wheel cylinders on my Pontiac Trans Sport at the same time?
Yes. If one Trans Sport cylinder has leaked or seized due to age and corrosion, the cylinder on the opposite side of the Pontiac Trans Sport has experienced identical conditions and is at a similar stage of deterioration. Replacing both ensures balanced hydraulic pressure on your Trans Sport and avoids a second service call within months.
Do I need to bleed the brakes on my Pontiac Trans Sport after replacing a wheel cylinder?
Yes. Replacing a Trans Sport wheel cylinder opens the hydraulic circuit, allowing air to enter. After installation on the Pontiac Trans Sport, the entire rear brake circuit must be bled to remove all air and restore a firm, consistent brake pedal on your Trans Sport.