Rear Drum Brake Wheel Cylinder for 1992-2000 Toyota 4Runner & More - Dorman W37842

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$17.99
MPN: W37842
Item Package Quantity: 1
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Dorman - First Stop Drum Brake Wheel Cylinder P/N:W37842
Dorman - First Stop Drum Brake Wheel Cylinder P/N:W37842
$17.99

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.

  • Ideal replacement: Specifically engineered as a direct match for the original drum brake wheel cylinder on the listed applications.
  • Cost-effective fix: Replacing the cylinder while the drum brakes are already apart for service is a fast step that helps maintain braking performance.
  • Quality materials: Built with high-quality EPDM rubber cups and boots.
  • Professionally tested: Cylinder bores are surface-tested to provide an optimum sealing surface for the pressure cups.

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:

18E306, 784-22708, 84-22708, W906639, W-56708, 072-8393, 072-8752, 34032, 34142, 134.44708, 134.44717, 135.44708, WC14032, 375-76030, 375-76035, WC37842, 4755026110, 4755035200, F119511, F131917, WC119511, WC131917

Frequently Asked Questions

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.