Dorman - First Stop Drum Brake Wheel Cylinder P/N:W37157
Put hydraulic pressure back to work at the rear drums with this Dorman drum brake wheel cylinder, part number W37842 from the Dorman - First Stop line. It is a direct-fit replacement for the rear drum brakes on the 1989 and 1992-2000 Toyota 4Runner and the 1993-1998 Toyota T100. See the Buyer's Guide tab for engine details and the full application list.
Inside the drum, the wheel cylinder takes fluid pressure from the master cylinder and pushes its pistons outward to press the brake shoes against the drum. Dorman engineered this unit as a direct match for the original wheel cylinder, designed to mirror its fit, function and performance, and each one is manufactured and tested for quality assurance.
Signs a wheel cylinder may need replacing include brake fluid seeping inside the drum or at the backing plate, fluid-soaked brake shoes, or a soft or sinking brake pedal. Diagnose the brake system to confirm the cause, and bleed the brakes after installation.
Interchange: 784-22708 · 84-22708 · W-56708 · 072-8393 · 072-8752 · 134.44708 · 134.44717 · 135.44708 · 375-76030 · 375-76035
78422708 · 8422708 · W56708 · 0728393 · 0728752 · 13444708 · 13444717 · 13544708 · 37576030 · 37576035 · 18E306 · W906639 · 34032 · 34142 · WC14032 · WC37842 · 4755026110 · 4755035200 · F119511 · F131917 · WC119511 · WC131917
This part cross-references / interchanges with the following part numbers:
Which Toyota vehicles does wheel cylinder W37842 fit?
It fits the rear drum brakes of the 1989 and 1992-2000 Toyota 4Runner and the 1993-1998 Toyota T100. Check the Buyer's Guide tab for engine details and the full application chart.
What does a drum brake wheel cylinder do?
It takes hydraulic pressure from the master cylinder and pushes its pistons outward, pressing the brake shoes against the drum to slow the wheel.
What are the cups and boots made of?
The pressure cups and boots on this Dorman - First Stop wheel cylinder are made of high-quality EPDM rubber.
What are signs a wheel cylinder may need replacing?
Brake fluid seeping inside the drum, fluid-soaked shoes, or a soft brake pedal may point to a leaking wheel cylinder. Other brake faults can cause similar signs, so diagnose the system first.
Do I need to bleed the brakes after installing it?
Yes. Opening the brake line lets air into the system, so bleed the brakes after installation. Follow the vehicle service procedure for torque and shoe adjustment.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.