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 Oldsmobile 88, the hydraulic actuators at the top of each drum brake assembly that convert brake fluid pressure into the mechanical force that pushes the 88 shoes against the drum. Available in new and remanufactured options for your 88, 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 Oldsmobile 88 is the hydraulic component that actuates your 88 drum brake shoes every time you press the brake pedal. Brake fluid pressure from the master cylinder enters the 88 wheel cylinder and acts equally on two opposed pistons, pushing them outward simultaneously toward each shoe on the Oldsmobile 88. A leaking 88 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 Oldsmobile 88.
Oldsmobile 88 drum brake wheel cylinders are particularly vulnerable to corrosion in American road salt conditions. Salt water penetrates the dust boots over time on the 88, attacking the cylinder bore surface. Once the Oldsmobile 88 bore is pitted, new piston cup seals cannot maintain a leak-free seal. Internally corroded 88 cylinders must be replaced, not rebuilt. Vehicles in high-salt urban environments often require 88 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 Oldsmobile 88. New cylinders are the stronger choice for 88 vehicles in high-corrosion environments. Remanufactured units offer excellent value for Oldsmobile 88 vehicles in moderate conditions where the original bore was sound. Our vehicle selector confirms the correct 88 cylinder, right bore diameter, port location, and mounting configuration, for your 88 drum brake assembly before purchase.
Can I drive my Oldsmobile 88 with a leaking wheel cylinder?
No. A leaking 88 cylinder actively loses hydraulic pressure from the brake circuit, reducing stopping force on your Oldsmobile 88 over time. Brake fluid that reaches the 88 shoes renders the friction material ineffective. A leaking Oldsmobile 88 wheel cylinder is an immediate safety concern that requires urgent attention.
Should I replace both wheel cylinders on my Oldsmobile 88 at the same time?
Yes. If one 88 cylinder has leaked or seized due to age and corrosion, the cylinder on the opposite side of the Oldsmobile 88 has experienced identical conditions and is at a similar stage of deterioration. Replacing both ensures balanced hydraulic pressure on your 88 and avoids a second service call within months.
Do I need to bleed the brakes on my Oldsmobile 88 after replacing a wheel cylinder?
Yes. Replacing a 88 wheel cylinder opens the hydraulic circuit, allowing air to enter. After installation on the Oldsmobile 88, the entire rear brake circuit must be bled to remove all air and restore a firm, consistent brake pedal on your 88.