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Raybestos MC39037 Brake Master Cylinder
| Brand | Raybestos MC39037 |
|---|---|
| Mounting Hole Quantity | 2 |
| Master Cylinder Material | Iron |
| Mounting Hole Diameter | 0.433 |
| Bore Size | 0.875 |
| Primary Port Thread A | 1/2"-20 |
| Secondary Port Thread A | 7/16"-24 |
| Product line | Element3; New |
| Fits | Ford and Mercury · 21 vehicles |
OE-style replacement. Brake master cylinder with iron construction for dependable hydraulic performance.
Iron construction. Provides a durable housing for consistent brake system operation.
Element3 line. Raybestos brake hydraulics engineered for dependable stopping performance.
Cross-references Bosch 18083, Centric Parts 130.61031 and Dorman - First Stop M99084 for the same application. See all 35.
Raybestos MC39037 Brake Master Cylinder
The Raybestos Element3 New MC39037 brake master cylinder is built for select Ford and Mercury applications that need a direct hydraulic replacement with the correct bore, port threads, and mounting layout. It is a fitment-based solution for restoring brake pedal response on vehicles such as the Ford Mustang, Mercury Capri, Ford Fairmont, Mercury Cougar, Mercury Zephyr, and Ford Thunderbird.
Key Features
- Iron master cylinder construction for brake hydraulic service
- 0.875 bore size for the specified application
- 2 mounting holes with 0.433 mounting hole diameter
- Primary port thread: 1/2"-20
- Secondary port thread: 7/16"-24
- Raybestos Element3 New product line
- Part number MC39037 for catalog and cross-reference lookup
Product Details
Raybestos MC39037 is a brake master cylinder designed around the original hydraulic connection points and mounting pattern used on the listed vehicles. The iron body provides the structural base for brake fluid pressure generation, while the 0.875 bore size and port thread specifications help match the factory brake system layout. As part of the Raybestos Element3 New line, this master cylinder is positioned for direct replacement service on select 1978-1982 Ford and Mercury models.
This part cross-references Bosch 18083 and Dorman - First Stop M99084 for the same application. Search by MC39037 when verifying brake master cylinder replacement for Ford Mustang, Mercury Capri, and related rear-wheel-drive Ford/Mercury platforms.
Common Problems This Part Addresses
- Brake pedal that sinks or loses firmness due to internal master cylinder wear
- External fluid leakage from the master cylinder body or ports
- Uneven hydraulic pressure affecting brake response
- Corrosion or damage to the original iron master cylinder housing
- Need for a replacement master cylinder with the correct bore and port thread sizes
Installation Notes and Tips
Confirm the mounting hole count, mounting hole diameter, bore size, and both port thread sizes before installation. Verify brake line routing and reservoir-to-line alignment against the original unit on the vehicle. After installation, bleed the brake system thoroughly and inspect all connections for leaks before returning the vehicle to service. Use the vehicle-specific fitment data to confirm application on 1978-1982 Ford Mustang, 1979-1982 Mercury Capri, 1978-1981 Ford Fairmont, 1980-1981 Mercury Cougar, 1978-1981 Mercury Zephyr, and 1980 Ford Thunderbird.
Quality Assurance
Raybestos brake hydraulics are cataloged for application-specific replacement, and the Element3 New line identifies this master cylinder as a new service part for the listed fitments. Always verify MC39037 against the original part and vehicle brake system specifications before installation.
| Year | Make | Model | Submodel | Liters | Cylinders | Notes |
|---|---|---|---|---|---|---|
| 1982 | Ford | Mustang | — | 2.3L | L4 | Element3; New |
| 1982 | Mercury | Capri | — | 2.3L | L4 | Element3; New |
| 1981 | Ford | Fairmont | — | — | — | Element3; New |
| 1981 | Ford | Granada | — | — | — | Element3; New |
| 1981 | Ford | Mustang | — | — | — | Element3; New |
| 1981 | Mercury | Capri | — | 2.3L | L4 | Element3; New |
| 1981 | Mercury | Cougar | Base | — | — | Element3; New |
| 1981 | Mercury | Cougar | XR-7 | — | — | Thru 6/81; Element3; New |
| 1981 | Mercury | Zephyr | — | — | — | Element3; New |
| 1980 | Ford | Fairmont | — | — | — | Element3; New |
| 1980 | Ford | Mustang | — | — | — | Element3; New |
| 1980 | Ford | Thunderbird | — | — | — | Element3; New |
| 1980 | Mercury | Capri | — | — | — | Element3; New |
| 1980 | Mercury | Cougar | XR-7 | — | — | Element3; New |
| 1980 | Mercury | Zephyr | — | — | — | Element3; New |
| 1979 | Ford | Fairmont | — | — | — | Element3; New |
| 1979 | Ford | Mustang | — | — | — | Element3; New |
| 1979 | Mercury | Capri | — | — | — | Element3; New |
| 1979 | Mercury | Zephyr | — | — | — | Element3; New |
| 1978 | Ford | Fairmont | — | — | — | Element3; New |
| 1978 | Mercury | Zephyr | — | — | — | Element3; New |
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