Bring a worn drum brake wheel cylinder back into service with the Dorman - First Stop Drum Brake Wheel Cylinder Kit 5381. The wheel cylinder is the hydraulic actuator that pushes the brake shoes outward against the drum; over time its internal seals wear and can weep brake fluid. This repair kit supplies the internal sealing pieces needed to rebuild a 1-inch-bore wheel cylinder, and it's cataloged for both front and rear drum brake positions across a wide range of vintage vehicles — including the 1949-1951 Frazer Frazer [All], 1958-1963 American Motors American [All], 1963-1967 Dodge Dart [All], and 1965-1970 American Motors Ambassador [All]. See the "Vehicles it fits" section for the full list.
- What's in the kit: wheel cylinder cups and dust boots (the package includes boots and seals).
- Not included: wheel cylinder pistons, the expander spring, the bleeder screw, the bleeder screw cap, and mounting hardware — transfer or replace these as directed by the service procedure, and consult the vehicle service information for whether the originals may be reused.
- Bore size: designed for a wheel cylinder with a 1 in (1-inch) bore.
- Quality build: made from quality components and backed by a U.S.-based product-support team with more than a century of automotive know-how.
If worn cups or boots are the cause of a leaking or dragging drum brake, this kit rebuilds the cylinder's seal; diagnose the cause before servicing. Country of origin: China.
Interchange: 85-32011 · 8532011 · 85-38010 · 8538010 · K922536 · KW-83011 · KW83011 · KW-84010 · KW84010 · 66824 · 144.64010 · 2084788 · 3108073 · 3201980 · 3549805 · J8126749 · WK5381 · WK53811 · D1FZ2221A · D2FZ2221A · 5461606 · 5474008 · 35106 · WK-106 · WK106 · 532627 · F13700 · F5381 · WK13700
Manufacturer part number 5381
This part cross-references / interchanges with the following part numbers:
85-32011, 85-38010, K922536, KW-83011, KW-84010, 66824, 144.64010, 2084788, 3108073, 3201980, 3549805, J8126749, WK5381, WK53811, D1FZ2221A, D2FZ2221A, 5461606, 5474008, WK106, 532627, F13700, F5381, WK13700
Frequently Asked Questions
What does this kit do?
It rebuilds the internal sealing components of a drum brake wheel cylinder. If worn cups or boots are causing a fluid leak or soft pedal, this kit replaces them to restore a proper hydraulic seal.
What's included in the kit?
It includes the wheel cylinder cups and dust boots (boots and seals). It does not include the pistons, the expander spring, the bleeder screw, the bleeder screw cap, or mounting hardware.
What bore size does it fit?
It's designed for a wheel cylinder with a 1-inch (1 in) bore. Confirm your wheel cylinder's bore size and application in the "Vehicles it fits" section before ordering.
Does it fit front or rear brakes?
This kit is cataloged for both front and rear drum brake applications on the listed vehicles. Check the "Vehicles it fits" section to confirm fitment for your specific vehicle.
How many kits do I need?
The listed applications use a quantity of 2, so you'll typically need two kits — one per wheel cylinder on the axle. Rebuilding both sides together supports balanced braking; confirm the quantity for your vehicle.
