The clutch master cylinder is the first connection between the pedal and the clutch hydraulic system. It allows hydraulic fluid through the line to the slave cylinder, where your clutch pack is engaged and disengaged. Due to the corrosive qualities of brake/hydraulic fluid, it's common for delicate rubber seals in the master cylinder to wear out causing fluid loss when the clutch pedal is engaged. Replace your clutch master cylinder to help restore smooth shifting and a stiff pedal.

When replacing this part, the lines will need bleed and some brake fluid may be lost. Be sure to pick up some fluid to restore your clutch performance.