unbolt from bellhousing and replace with a new one
seal has gone on slave cylinder, it needs replacing.
If no signs of leakage at slave operating cylinder,then check clutch master cylinder for leakage,and look at clutch pedal and see if you see any clutch fliud as rod comes thru firewall.follow all lines.
the easiest thing to do is remove the slave cylinder then pump the pedal and the fluid will pour out
There are two normal causes. The clutch is worn out or there is a leak in the hydraulic clutch slave or master cylinder. To check the clutch, press the clutch slave cylinder down. If the clutch slave cylinder bellows compresses down to the slave cylinder, the clutch is worn out. Check the clutch master cylinder fluid level. if this is low, then the clutch cylinder need to be checked. To check for a hydraulic leak in the clutch slave cylinder, remove the cylinder's bellows and check for any fluid. If fluid is present, rebuild or replace the cylinder and bleed the system. To check the clutch master cylinder, check the back the of clutch master cylinder for leaks. If fluid is present, replace or rebuild clutch master cylinder and bleed the system. In my experience, hydraulic leaks occur at the clutch slave cylinder.
The clutch slave cylinder , for a hydraulic clutch , is inside the manual transmission bellhousing
The clutch slave cylinder for a hydraulic clutch is inside the manual transmission bellhousing
Replacing the clutch slave cylinder requires removing the transmission assembly. I would recommend purchasing a shop repair manual for that vehicle if you intend on DIY.
The master clutch cylinder is attached to the clutch pedal. When one depresses the pedal hydraulic fluid is forced from the master cylinder through the hard line to the slave cylinder. The piston in the slave cylinder is driven against the clutch linkage thereby releasing the clutch.
The clutch slave cylinder in your 1998 Mitsubishi does not use fluid. The clutch slave cylinder is sealed with grease inside of it.
In cylinder
The clutch master cylinder is in the engine compartment and the slave cylinder for the hydraulic clutch is inside the manual transmission bellhousing
The clutch pedal assembly has a clutch rod that pushes in on a clutch master cylinder. There is a hydro line that goes from the master cylinder to the slave cylinder.