92 jeep wrangler clutch fluid has had a slow leak internally and now the pressure appears to be leaking and o can get the vehicle into or out of gear without pumping the clutch to build up pressure. What needs to be fixed?

Your clutch is hydraulically operated. If you see no leaks, good chance that the master clutch cylinder on the firewall is internally bypassing and not holding pressure. Sometimes though you see no leaks, if you look under the dash where the clutch rod goes into the backside of the unit, you may see some seepage there but they don't always leak. The master works exactly like the one that operates your brakes and they too will have the same problem as the internal piston seal gets worn.

First place you need to look is at the clutch master cylinder on the firewall next to the brake MC. Ifg it's empty then re-fill it and s5tart to look for a leak. It is a sealed system exactly like your brake,therefore any fluid loss indicates a leak. Check on the firewall under the master, where the clutch pedal rod goes into the cylinder under the dashboard (inside the car). Check the line to the slave unit and the slave. It helps to have someone pump the clutch pedal to make any leak more obvious. If you find the leak, replace the part that is leaking. If it appears not to be leaking, replace the master as it can internally bypass and not build pressure.
Bleed valve is located on the slave. Bleed as you would a brake.
Some slave units are part of the throwout bearing...if so, to replace it, the transmission needs to be removed. but bleed valve should be on a line right near the pressure line going into the bellhousing.

This is a typical master cylinder failure. PRE bleed a new m/c and install that.

If you have replaced the slave unit, and bled the system, then I'd replace the master cylinder on the firewall and bleed it again.
It seems though that you are a bit week on the diagnostics end...A slave unit is bad only if it is leaking fluid or frozen from non use. A bad master, can either leak externally (usually visible where the rod goes into it on the passenger side of the firewall) or internally bypass causing the slave not to move. The line between them cannot be leaking either or nothing will work. If everything appears to be working but the clutch will not disengage it is possible that the clutch itself is bad.

It is likely leaking at the slave cylinder

No. the pressure is too high and the fluid type is completely different than what is used in stop leak which is used in other hydraulic systems. Your clutch uses the same fluid as the brakes do. DOT3 or DOT4. Adding anything other than that will contaminate and ruin the system.

Sounds like you are having a clutch problem. The sudden looseness in the clutch pedal indicates a problem with either the hydralic system, (slave or master or line) leaking or clutch pressure plate going out. Check your clutch fluid resevoir first, if low look for a leak under the vehicle, have a friend push the clutch and get underneath to find leak.

Sound like your clutch master cylinder has developed a internal leak or maybe even leaking out the back past the seals. Have you checked the brake fluid level in the clutch master cylinder resorvoir it may be low and you have air in the system. Either way you have a leak somwhere in the system and you need to determine where it is. Fill your resorvoir with approved fluid and while some one is pumping your clutch pedal see if you can see where the fluid is leaking from the jeep. Reair or replace as necessary.
good Luck

Your clutch system works the same as brakes do. The necessity to bleed tells you that there is a malfunction permitting air into the system. Check where the pedal rod goes into the firewall under the dash, the line itself, and the slave unit (some are inside the bellhousing...look for fluid dripping from bottom to verify if leaking) Not unlike brake master, they can also internally bypass. If you find no leaks, change master. Bleed system and you should be fine

bleeding cluch 96 jeep