Dorman CM39179 Clutch Master Cylinder

Clutch Master Cylinder Replacement

The Dorman CM39179 clutch master cylinder is a direct replacement for select Toyota manual transmission applications. It is precision-engineered to match the original equipment design, helping restore consistent hydraulic clutch operation in vehicles such as the Toyota Pickup, Toyota 4Runner, and Toyota Cressida.

Built as a standard replacement with a 0.625 bore diameter, this clutch master cylinder is intended for vehicles that need an OE-style hydraulic clutch component with the correct fit and function.

Key Features

• Direct replacement clutch master cylinder for specific Toyota applications
• 0.625 bore diameter for OE-style hydraulic performance
• Standard replacement grade for everyday repair use
• Package contents: clutch master cylinder
• Part number CM39179 for easy identification

Detailed Description

Dorman CM39179 is engineered to match the original equipment design for select Toyota manual transmission vehicles. It is a practical replacement choice when the original clutch master cylinder is leaking, sticking, or no longer maintaining proper hydraulic pressure. This part cross-references Four Seasons 39179 for the same application. The CM39179 is listed for 1979-1989 Toyota Pickup, 1984-1989 Toyota 4Runner, and 1981-1988 Toyota Cressida, with fitment notes calling out drum brake wheel cylinders featuring a 5/8" bore size.

Common Issues This Part Can Address

• Clutch pedal sinking or losing pressure
• Visible hydraulic fluid leakage at the master cylinder
• Difficulty disengaging the clutch
• Inconsistent clutch pedal feel
• Hydraulic clutch performance loss in manual transmission Toyota models

Installation Notes and Tips

Verify the bore diameter and vehicle fitment before installation. Confirm the application notes for drum brake wheel cylinders with a 5/8" bore size on the listed Toyota models. Inspect the hydraulic line, reservoir, and related clutch components for wear or contamination before replacing the master cylinder. After installation, bleed the hydraulic system thoroughly to remove air and restore proper pedal feel.

Quality Assurance

This Dorman clutch master cylinder is a precision-engineered direct replacement built to match original equipment design requirements for the listed Toyota applications. The standard replacement construction and OE-style dimensions support a straightforward repair on compatible manual transmission vehicles.