GeoBrakes carries OEM-grade drum brake wheel cylinders confirmed to fit the Dodge 400, the hydraulic actuators at the top of each drum brake assembly that convert brake fluid pressure into the mechanical force that pushes the 400 shoes against the drum. Available in new and remanufactured options for your 400, every cylinder is bored to OEM specifications
The drum brake wheel cylinder on the Dodge 400 is the hydraulic component that actuates your 400 drum brake shoes every time you press the brake pedal. Brake fluid pressure from the master cylinder enters the 400 wheel cylinder and acts equally on two opposed pistons, pushing them outward simultaneously toward each shoe on the Dodge 400. A leaking 400 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 Dodge 400.
Dodge 400 drum brake wheel cylinders are particularly vulnerable to corrosion in American road salt conditions. Salt water penetrates the dust boots over time on the 400, attacking the cylinder bore surface. Once the Dodge 400 bore is pitted, new piston cup seals cannot maintain a leak-free seal. Internally corroded 400 cylinders must be replaced, not rebuilt. Vehicles in high-salt urban environments often require 400 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 Dodge 400. New cylinders are the stronger choice for 400 vehicles in high-corrosion environments. Remanufactured units offer excellent value for Dodge 400 vehicles in moderate conditions where the original bore was sound. Our vehicle selector confirms the correct 400 cylinder, right bore diameter, port location, and mounting configuration, for your 400 drum brake assembly before purchase.
Can I drive my Dodge 400 with a leaking wheel cylinder?
No. A leaking 400 cylinder actively loses hydraulic pressure from the brake circuit, reducing stopping force on your Dodge 400 over time. Brake fluid that reaches the 400 shoes renders the friction material ineffective. A leaking Dodge 400 wheel cylinder is an immediate safety concern that requires urgent attention.
Should I replace both wheel cylinders on my Dodge 400 at the same time?
Yes. If one 400 cylinder has leaked or seized due to age and corrosion, the cylinder on the opposite side of the Dodge 400 has experienced identical conditions and is at a similar stage of deterioration. Replacing both ensures balanced hydraulic pressure on your 400 and avoids a second service call within months.
Do I need to bleed the brakes on my Dodge 400 after replacing a wheel cylinder?
Yes. Replacing a 400 wheel cylinder opens the hydraulic circuit, allowing air to enter. After installation on the Dodge 400, the entire rear brake circuit must be bled to remove all air and restore a firm, consistent brake pedal on your 400.