Dorman - First Stop Drum Brake Wheel Cylinder W45997
Dorman - First Stop Drum Brake Wheel Cylinder W45997 - view 2
Dorman - First Stop Drum Brake Wheel Cylinder W45997 - view 3
Dorman - First Stop Drum Brake Wheel Cylinder W45997
Dorman - First Stop Drum Brake Wheel Cylinder W45997 - view 2
Dorman - First Stop Drum Brake Wheel Cylinder W45997 - view 3

Dorman - First Stop Drum Brake Wheel Cylinder P/N:W45997

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$24.99
MPN: W45997
Item Package Quantity: 1
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Dorman - First Stop Drum Brake Wheel Cylinder P/N:W45997
Dorman - First Stop Drum Brake Wheel Cylinder P/N:W45997
$24.99

Keep the front-left drum brake building firm hydraulic pressure with the Dorman - First Stop Drum Brake Wheel Cylinder W45997. It drops in as a direct-fit replacement for the front-left wheel cylinder on a range of classic Chevrolet and GMC trucks, vans and SUVs, from the 1964-1970 Chevrolet C10 Pickup to the 1969-1970 Chevrolet Blazer and 1967-1970 GMC C15/C1500 Pickup.

Mounted in the drum brake, this cast iron cylinder uses brake fluid pressure from the master cylinder to push its internal pistons and cups outward, forcing the brake shoes against the drum to slow the wheel. Signs the original may need replacing include fluid leaking at the backing plate, a soft or sinking pedal, and uneven or grabbing drum braking; if a leaking or seized cylinder is the cause, this replaces it.

  • Cast iron body: 1.125 in bore with a 7/16-20 inlet thread.
  • EPDM rubber cups and boots: high-quality sealing components.
  • Professionally tested: the bore is surface-tested for an optimum sealing surface for the pressure cups.
  • Bleeder screw included (bleeder screw cap not included); ships as one wheel cylinder.

Fitment (all engines): 1964-1970 Chevrolet C10 Pickup; 1964-1967 Chevrolet P10 Series; 1964-1966 Chevrolet Suburban; 1964-1965 GMC 1500 Series; 1964-1966 GMC Suburban; 1967-1970 Chevrolet P10 Van; 1967-1970 GMC C15/C1500 Pickup; 1967-1970 GMC C15/C1500 Suburban; 1967-1970 GMC P15/P1500 Van; 1968-1970 Chevrolet C10 Suburban; 1969-1970 Chevrolet Blazer; 1970 GMC Jimmy; 1971 Chevrolet G10 Van; 1971 GMC G15/G1500 Van.

Interchange: 784-44005 · 78444005 · 84-44005 · 8444005 · W906211 · 101-1629 · 1011629 · W-86005 · W86005 · 33441 · 134.66005 · 135.66005 · WC13441 · 375-47058 · 37547058 · 19175549 · 5457164 · 5464560 · 45997 · 2037025 · WC37025 · F45997 · WC45997. Manufacturer part number W45997.

Country of origin: China.

This part cross-references / interchanges with the following part numbers:

784-44005, 84-44005, W906211, 101-1629, W-86005, 33441, 134.66005, 135.66005, WC13441, 375-47058, 19175549, 5457164, 5464560, 45997, 2037025, WC37025, F45997, WC45997

Frequently Asked Questions

What does this wheel cylinder do?

It mounts in the drum brake and uses brake fluid pressure to push its pistons and cups outward, pressing the shoes against the drum. If a leaking or seized cylinder is your issue, this replaces it.

What position and vehicles does it fit?

This is the front-left drum brake wheel cylinder for the listed classic Chevrolet and GMC trucks, vans and SUVs. Check the Buyer's Guide tab to confirm it matches your vehicle.

What comes with it?

It includes a pre-installed bleeder screw; a bleeder screw cap is not included. The package contains one drum brake wheel cylinder.

What are the bore and thread specs?

The bore has a 1.125 in inside diameter with a 7/16-20 inlet thread. The body is cast iron with high-quality EPDM rubber cups and boots.

Should I replace both sides at once?

It's sold individually as one cylinder. Replacing the cylinders on both sides and bleeding the brakes at the same time is good practice for even, balanced braking.

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