Dorman - First Stop Drum Brake Wheel Cylinder P/N:W37877

Keep your drum brakes clamping evenly with the Dorman First Stop Drum Brake Wheel Cylinder W37877, a rear-left drum brake wheel cylinder that uses hydraulic pressure from the brake line to push the shoes outward against the drum. It installs as a direct-fit replacement engineered to match the fit, function and performance of the original cylinder on the listed applications — the 1995-2004 Chevrolet W3500 Tiltmaster and 1988-1997 Chevrolet W4500 Tiltmaster, the 1995-2004 GMC W3500 Forward and 1992-1997 GMC W4500 Forward, and the 1988-2004 Isuzu NPR (All engines).

• Cast-iron body: houses a 1.063 in bore with two M10 x 1.0 inlet threads.
• EPDM rubber cups and boots: high-quality materials for long-lasting performance.
• Professionally tested: the bore is surface-tested to provide an optimum sealing surface for the pressure cups.
• Bleeder screw not included: consult the vehicle service information for the correct bleeder screw and cap.

Signs this cylinder may need replacing include brake fluid seeping at the wheel or backing plate, a soft or spongy pedal, and uneven drum-brake action. If a leaking or seized wheel cylinder is the cause, replacing it while servicing the drum brakes helps restore normal hydraulic operation. The Chevrolet and GMC applications use two, while the Isuzu NPR uses one; each is packaged individually (1 per box). Country of origin: China.

Interchange: 18E340 · 84-24018 · 8424018 · W906673 · W-62018 · W62018 · 34148 · 134.76018 · WC257360 · 375-47082 · 37547082 · 94468359 · 97228020 · 8943661691 · 8944683591 · 8972280200 · WC370008 · WC37877 · F123253 · F140760 · WC123253 · WC140760 · Manufacturer part number W37877.