Bring your rear drum brakes back to proper working order with the Dorman drum brake wheel cylinder W79767 from the First Stop line. When you press the pedal, it turns hydraulic pressure into force that pushes the brake shoes outward against the drum. It fits many vehicles, among them the 1994-1999 Dodge Ram 2500, 1988-2000 GMC C3500 and 1989-2000 GMC C2500, and it is cataloged for the rear position, left and right. See the "Vehicles it fits" section for the full list.
Dorman engineered this direct-replacement wheel cylinder to match the fit, function and performance of the original unit on the listed applications. Each cylinder is manufactured and tested for quality assurance.
- Direct match: designed to take the place of the original drum brake wheel cylinder on the listed vehicles.
- Cost-effective service: Dorman notes that replacing the cylinder while the drum brakes are already apart is a quick, economical way to help maintain brake performance.
- EPDM rubber cups and boots: the cups and boots are made with high-quality EPDM rubber.
- Surface-tested bores: the cylinder bores are surface-tested to provide an optimum sealing surface for the pressure cups.
A wheel cylinder may need replacing if you see brake fluid seeping past the boots, damp brake shoes or a wet drum interior, a soft or low brake pedal, or a falling brake fluid level. Diagnose the cause before replacing parts, and follow the vehicle service information for installation and bleeding.
Interchange: 172-1215 · 784-44014 · 84-44014 · 101-1639 · W-86014 · 134.66014 · 135.66014 · 375-47067
1721215 · 78444014 · 8444014 · 1011639 · W86014 · 13466014 · 13566014 · 37547067 · 18E112 · W906376 · 33709 · 34103 · 4761603 · WC13709 · 18004794 · 18060026 · 19213345 · 2621260 · 79767 · WC37290 · F79767 · WC79767
This part cross-references / interchanges with the following part numbers:
172-1215, 18E112, 784-44014, 84-44014, W906376, 101-1639, W-86014, 33709, 34103, 134.66014, 135.66014, 4761603, WC13709, 375-47067, 18004794, 18060026, 19213345, 2621260, 79767, WC37290, F79767, WC79767
Frequently Asked Questions
What does a drum brake wheel cylinder do?
It turns hydraulic pressure from the brake master cylinder into force that pushes the brake shoes outward against the drum. W79767 is cataloged for the rear position, left and right.
Which vehicles does the Dorman W79767 fit?
It fits many vehicles, among them the 1994-1999 Dodge Ram 2500, 1988-2000 GMC C3500 and 1989-2000 GMC C2500. Check the "Vehicles it fits" section for your exact vehicle.
What are the cups and boots made of?
Dorman makes the cups and boots with high-quality EPDM rubber. The cylinder bores are surface-tested to give the pressure cups an optimum sealing surface.
What are signs of a failing wheel cylinder?
Common signs include brake fluid leaking past the boots, wet brake shoes or a wet drum interior, a soft or low pedal, and a dropping fluid level. Diagnose the cause before replacing parts.
Do I need to bleed the brakes after installing it?
Yes. Replacing a wheel cylinder opens the hydraulic system, so the brakes must be bled afterward. Follow the vehicle service information for the correct procedure.
