Dorman CM39644 Clutch Master Cylinder

Dorman CM39644 Clutch Master Cylinder

Dorman CM39644 is a direct replacement clutch master cylinder for manual transmission service on select Jeep Wrangler models. It is precision-engineered to match the original equipment design, with a 0.688 bore diameter and standard replacement grade construction for a reliable hydraulic repair.

Key Features

• Direct replacement clutch master cylinder for specific Jeep Wrangler applications
• 0.688 bore diameter for OE-style hydraulic performance
• Standard replacement grade for everyday repair use
• Matches original equipment design for proper fit and function
• Package contents: clutch master cylinder

Detailed Description

This Dorman clutch master cylinder is built for 1987-1990 Jeep Wrangler models, including drum brake applications with an 11/16 inch bore size. It is intended for manual transmission clutch hydraulic repair where the original master cylinder is leaking, sticking, or no longer maintaining consistent pedal pressure. The CM39644 part number is also referenced in aftermarket catalogs for the same application, including Four Seasons 39644 and LuK LMC208.

For buyers searching for a 1987 Jeep Wrangler clutch master cylinder, a 1988-1990 Jeep Wrangler hydraulic clutch master cylinder, or a direct replacement clutch master cylinder for Jeep Wrangler drum brake models, this part provides an OE-style service solution. The CM39644 designation helps confirm the correct replacement when matching the bore size and vehicle fitment.

What It Helps Fix

• Clutch fluid leakage from the master cylinder
• Soft or inconsistent clutch pedal feel
• Difficulty disengaging the clutch
• Loss of hydraulic pressure in the clutch system
• Wear-related failure in the original master cylinder

Installation Notes and Tips

Verify bore diameter and vehicle fitment before installation. This part is listed for 1987-1990 Jeep Wrangler models with drum brakes and an 11/16 inch bore size. Inspect the clutch hydraulic line, reservoir connection, and related components for wear or contamination during replacement. Proper bleeding of the hydraulic system is required after installation to restore pedal operation.

Quality Assurance

Dorman designs this direct replacement clutch master cylinder to follow the original equipment layout for the listed application. The CM39644 is a standard replacement part intended for dependable service in manual transmission clutch hydraulic repairs.