Turn brake-pedal pressure into shoe-to-drum force with the Dorman drum brake wheel cylinder W17508 from the First Stop line, a direct replacement designed to match the original wheel cylinder in fit, function and performance. It fits many vehicles, among them the 1993-1996 Jeep Grand Cherokee, 1987-1989 Jeep Wrangler and 1966-1973 Ford Mustang, and it is cataloged for the rear right position.
When you press the brake pedal, fluid from the master cylinder pushes the wheel cylinder's pistons outward. That movement forces the brake shoes against the drum. A leaking or sticking cylinder can affect how the drum brakes apply. If the wheel cylinder is the cause, W17508 replaces it.
- Direct replacement: engineered as a direct match for the original drum brake wheel cylinder on the listed applications.
- EPDM rubber cups and boots: the pressure cups and boots are made from high-quality EPDM rubber.
- Surface-tested bores: each cylinder bore is surface-tested, intended to give the pressure cups an optimum sealing surface.
- Quality checked: manufactured and tested for quality assurance.
Dorman recommends replacing the wheel cylinder while the drum brakes are apart as a cost-effective service step. Signs this part may need replacing include brake fluid on the backing plate or inside the drum, a soft or sinking pedal, and pulling to one side under braking. Diagnose the cause before replacing parts. Bleed the brake system after installation. Replacing both sides together is recommended for balanced braking. See the "Vehicles it fits" section for the full list of vehicles.
Frequently Asked Questions
What does a drum brake wheel cylinder do?
It converts hydraulic pressure from the master cylinder into force. That force pushes the brake shoes outward against the drum when you press the brake pedal.
Does the Dorman W17508 fit the 1993-1996 Jeep Grand Cherokee?
Yes, it is listed for the 1993-1996 Jeep Grand Cherokee, the 1987-1989 Jeep Wrangler and the 1966-1973 Ford Mustang in the rear right position. Check the "Vehicles it fits" section for your exact vehicle.
What are the cups and boots made of?
Dorman makes the cups and boots on this wheel cylinder from high-quality EPDM rubber. The bores are surface-tested to provide a sealing surface for the pressure cups.
What signs suggest a wheel cylinder may need replacing?
Common signs include brake fluid leaking onto the backing plate or drum, a soft or sinking brake pedal, and pulling to one side while braking. Diagnose the cause before replacing parts.
Do I need to bleed the brakes after installing it?
Yes. Opening the hydraulic system lets air in, so bleed the brakes after installation and follow the vehicle service information for the procedure and torque values.
