Turn pedal pressure into rear brake-shoe movement with the Dorman drum brake wheel cylinder W37423 from the First Stop line, a direct replacement for the 1979-1985 Buick Riviera, 1979-1985 Oldsmobile Toronado and 1987-1993 Chevrolet LLV. When you press the brake pedal, hydraulic pressure from the master cylinder pushes the wheel cylinder's pistons outward. The pistons spread the brake shoes against the drum.
Dorman engineered this rear wheel cylinder as a direct match for the original unit on the listed applications. It is designed to replicate the original's fit, function and performance, and each one is manufactured and tested for quality assurance.
- Ideal replacement: Built as a direct match for the original drum brake wheel cylinder on the listed vehicles.
- Cost-effective repair: Replacing the cylinder during a drum brake service helps keep the rear hydraulic system in good working order.
- Quality materials: Uses EPDM rubber cups and boots.
- Professionally tested: The cylinder bores are surface-tested to give the pressure cups an optimum sealing surface.
A wheel cylinder may need replacing if you see brake fluid inside the drum or running down the backing plate, if the brake pedal feels soft or low, or if braking is uneven. Diagnose the cause before replacing parts. Bleed the brake system after installation according to the vehicle service information.
Interchange: 784-36047 · 84-36047 · W-82047 · 134.62047 · 135.62047 · 375-45010
78436047 · 8436047 · W82047 · 13462047 · 13562047 · 37545010 · 18E160 · W906464 · 33799 · WC13799 · 18003905 · WC370268 · F98905 · WC98905
This part cross-references / interchanges with the following part numbers:
18E160, 784-36047, 84-36047, W906464, W-82047, 33799, 134.62047, 135.62047, WC13799, 375-45010, 18003905, WC370268, F98905, WC98905
