Keep hydraulic pressure flowing to your rear drum brake shoes with the Dorman First Stop Drum Brake Wheel Cylinder W37245. Mounted on the rear axle, it converts brake-line pressure into piston movement that pushes the shoes outward against the drum. It's a direct-fit replacement engineered to match the original wheel cylinder's fit, function, and performance on the 1971-1975 Opel Manta, 1972-1973 Opel Opel, and 1973-1975 Opel 1900 (All engines), and it's manufactured and tested for quality assurance.
Leaking brake fluid at the wheel, a low or spongy pedal, or fluid-contaminated shoes are signs this wheel cylinder may need replacing; replacing it while servicing the drum brakes is a fast, cost-effective way to address a failed cylinder. Each listed application uses two rear wheel cylinders (one per side); this package contains one. Country of origin: Italy.
Interchange: 84-78000 · 8478000 · 84-78002 · 8478002 · W906341 · W-13000 · W13000 · 072-1548 · 0721548 · 33662 · 134.36000 · WC13662 · 375-22000 · 37522000 · 5500401 · 5500501 · 550056 · WC37245 · F100685 · WC100685 · Manufacturer part number W37245.
This part cross-references / interchanges with the following part numbers:
What does this wheel cylinder do?
Mounted on the rear drum brakes, it converts hydraulic brake-line pressure into piston movement that pushes the brake shoes outward against the drum.
Does it fit my vehicle?
It's a direct-fit replacement for the 1971-1975 Opel Manta, 1972-1973 Opel Opel, and 1973-1975 Opel 1900 (All engines). Check the Buyer's Guide tab to confirm your vehicle.
Is the bleeder screw included?
Yes, the bleeder screw is included. The bleeder screw cap is not included.
What are the bore and thread specifications?
It has a 0.625 in inside diameter and an M10 x 1.0 inlet thread (10 mm thread diameter, 1.0 pitch).
How many do I need?
Each listed application uses two rear wheel cylinders, one per side. This package contains one, so order two for a complete rear replacement.
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.