Luk LMC115 Clutch Master Cylinder

Clutch Master Cylinder for Manual Transmission Service

Restore hydraulic clutch operation with this LuK clutch master cylinder, part number LMC115. It is a new replacement component for manual transmission systems and includes the push rod and installation instructions for a straightforward service job.

• New clutch master cylinder for hydraulic clutch release systems
• Includes push rod
• Installation instructions included
• Reservoir not included
• Pre-filled fluid: no
• Pre-bled system: no
• Clutch slave cylinder not included

Fitment Coverage

• Fits 1987-1994 Chevrolet Cavalier, N/A
• Fits 1987-1994 Pontiac Sunbird, N/A
• Fits 1987-1989 Buick Skyhawk, N/A
• Fits 1987-1989 Chevrolet Cavalier, N/A. Refer to LB140 for hard pedal/clutch destruction and proper fitment.
• Fits 1987-1988 Cadillac Cimarron, N/A
• Fits 1987-1988 Oldsmobile Firenza, N/A
• Fits 1987 Oldsmobile Firenza, N/A. Refer to LB140 for hard pedal/clutch destruction and proper fitment.

Product Details

LuK has extensive experience in hydraulic clutch release systems, building on its role in the transition from mechanical to hydraulic clutch actuation. The LMC115 is a direct replacement clutch master cylinder for select Chevrolet Cavalier, Pontiac Sunbird, Buick Skyhawk, Cadillac Cimarron, and Oldsmobile Firenza applications. This part cross-references Dorman - First Stop CM350026 for the same application.

Common Issues This Part Addresses

• Soft or inconsistent clutch pedal feel
• Difficulty disengaging the clutch during shifting
• Hydraulic fluid loss at the master cylinder
• Clutch pedal travel problems caused by a worn master cylinder
• Manual transmission engagement issues tied to hydraulic release failure

Installation Notes

Verify vehicle-specific fitment before installation, especially for 1987 Chevrolet Cavalier applications with the LB140 note. The reservoir is not included, and the unit is not pre-filled or pre-bled, so the hydraulic system must be filled and bled after installation. Follow the included instructions and inspect the push rod connection and hydraulic line routing during service.

Quality Assurance

LuK, part of Schaeffler, brings long-standing engineering experience in clutch release systems and hydraulic actuation components. This new part is built for manual transmission service and is backed by the brand’s OE-focused development background.