Keep hydraulic pressure flowing to your rear drum brake shoes with the Dorman - First Stop Drum Brake Wheel Cylinder (W79985). Mounted at the rear drum, the cylinder converts brake-line pressure into outward piston movement that pushes the brake shoes against the drum. It drops in as a direct-fit replacement on classic AMC and Ford applications, including the 1970-1976 AMC Gremlin and Hornet, 1971-1973 Javelin, 1975-1976 Pacer, 1960-1964 Ford Falcon and Ranchero, 1960-1964 Mercury Comet, 1974-1978 Ford Mustang II, 1972-1980 Ford Pinto, 1975-1980 Mercury Bobcat, and 1964 Mercury Cyclone (All engines) — see the Buyer's Guide tab for the full list.
- Cast-iron body: machined to a 0.875 in bore with a 3/8-24 inlet thread.
- EPDM rubber cups and boots: high-quality sealing components for long-lasting performance.
- Surface-tested bore: the cylinder wall is surface-tested to provide an optimum sealing surface for the pressure cups.
- Includes a bleeder screw: bleeder screw cap not included.
Engineered to drop in like the original wheel cylinder on the listed vehicles, it is manufactured and tested for quality assurance. This listing is for one cylinder; each listed application uses two (one per rear wheel), so order two for a complete rear-drum service. Country of origin: China.
Interchange: 18E51 · 784-34022 · 78434022 · 84-34022 · 8434022 · W906213 · 101-1401 · 1011401 · W-81022 · W81022 · 33620 · 134.61022 · 135.61022 · J8126710 · WC13620 · 375-56004 · 37556004 · C0DD2261D · C3DZ2261B · D2FZ2261C · 5463020 · 79985 · 2037029 · WC37029 · F79985 · WC79985. Manufacturer part number W79985.
This part cross-references / interchanges with the following part numbers:
18E51, 784-34022, 84-34022, W906213, 101-1401, W-81022, 33620, 134.61022, 135.61022, J8126710, WC13620, 375-56004, C0DD2261D, C3DZ2261B, D2FZ2261C, 5463020, 79985, 2037029, WC37029, F79985, WC79985
