Push firm, even hydraulic pressure to the drum brake shoes with the Dorman - First Stop Drum Brake Wheel Cylinder W34178, the front right wheel cylinder for classic Mopar and AMC drum brakes. It installs as a direct-fit replacement for the 1960-1962 AMERICAN MOTORS AMERICAN, 1960-1966 PLYMOUTH VALIANT, 1961-1962 DODGE LANCER, 1963-1966 DODGE DART and 1964-1966 PLYMOUTH BARRACUDA — see the "Vehicles it fits" section for the full list.
How it works: when you press the brake pedal, fluid pressure enters the cylinder and drives its internal pistons outward, forcing the brake shoes against the drum.
- Hydraulic actuation: internal pistons convert brake-line pressure into the force that expands the shoes against the drum.
- Cups and dust boots: contain the brake fluid and help keep contaminants out of the bore.
- Front right position: cataloged for the front right wheel location on the listed applications.
- Direct-fit design: engineered to drop in on the listed vehicles for a straightforward brake service.
Signs a wheel cylinder may need replacing include fluid weeping behind the drum, a spongy or sinking pedal, or uneven braking. If a leaking or seized wheel cylinder is the cause, this replaces it; diagnose the brake system before installing.
Interchange: 84-32008 · 8432008 · W906160 · 101-1535 · 1011535 · W-83008 · W83008 · 33243 · 134.63008 · 2072616 · 3201976 · WC252280 · 375-40006 · 37540006 · 5461756 · WC34178 · F34178. Manufacturer part number W34178.
This part cross-references / interchanges with the following part numbers:
84-32008, W906160, 101-1535, W-83008, 33243, 134.63008, 2072616, 3201976, WC252280, 375-40006, 5461756, WC34178, F34178
Frequently Asked Questions
What does this wheel cylinder do?
It's the hydraulic actuator in a drum brake. When you press the pedal, fluid pressure drives its internal pistons outward, pushing the brake shoes against the drum to slow the wheel.
Which wheel position is this for?
It's cataloged for the front right wheel location on the listed applications.
What vehicles does the W34178 fit?
It's a direct-fit replacement for the 1960-1962 American Motors American, 1960-1966 Plymouth Valiant, 1961-1962 Dodge Lancer, 1963-1966 Dodge Dart and 1964-1966 Plymouth Barracuda. Check the "Vehicles it fits" section.
What are signs a wheel cylinder may need replacing?
Fluid weeping behind the drum or down the backing plate, a spongy or slowly sinking pedal, or uneven braking. Diagnose the brake system first, since other parts can cause these symptoms.
Do I need to bleed the brakes after installing it?
Yes. Any time you open a hydraulic line to replace a wheel cylinder, bleed that circuit afterward to remove trapped air and restore a firm pedal, following the vehicle service procedure.
