Dynamic Friction 355-40085 Brake Master Cylinder

Brake Master Cylinder for Ram 2500

The Dynamic Friction DFC Brake Master Cylinder, part number 355-40085, is a direct-fit hydraulic brake component for select Ram 2500 trucks with a vacuum booster. It is built for 2012-2018 Ram 2500 applications and supports consistent brake pedal response in daily driving and towing use.

Key Features

• Brake master cylinder for the DFC Brake Master Cylinder product line
• Fits 2012-2018 Ram 2500, vacuum booster applications
• Direct replacement part number 355-40085
• Supports hydraulic pressure transfer from the pedal to the brake system
• Built for brake system service on Ram 2500 trucks

Product Details

Dynamic Friction 355-40085 is a brake master cylinder for Ram 2500 models equipped with a vacuum booster. As part of the DFC Brake Master Cylinder line, this component is intended for hydraulic brake system repair where the original master cylinder has worn seals, internal leakage, or reduced pressure output. It fits 2012-2018 Ram 2500 trucks and is a relevant search match for Ram 2500 brake master cylinder replacement, vacuum booster master cylinder, and 355-40085 brake hydraulics service.

Common Issues It Can Address

• Soft or inconsistent brake pedal feel
• Brake fluid bypass inside the master cylinder
• Loss of hydraulic pressure in the brake system
• External fluid seepage at the master cylinder
• Brake performance concerns tied to a failing master cylinder

Installation Notes

Verify the vehicle uses a vacuum booster before ordering. Confirm the brake line connections, mounting pattern, and original part number match the existing unit on your Ram 2500. After installation, bleed the brake system thoroughly and check for leaks before returning the vehicle to service. Part number 355-40085 is listed for 2012-2018 Ram 2500, vacuum booster applications only.

Quality Assurance

Dynamic Friction supplies this DFC Brake Master Cylinder as a brake hydraulics replacement part for the specified Ram 2500 fitment.