'89 XJ, all stock, 4sp manual + od, 4L 6, 220k miles

Clutchmart replaced my clutch a year ago, and both cylinders. Should be good for a while. But the past couple weeks it's become harder to shift until now it almost will not. I topped up the fluid reservoir, made no difference. I have a vague memory of manual adjustments, but maybe I am remembering another vehicle. My Haynes says nothing about this. The transmission is old and worn but I've never had shifting trouble on its account and hate to think that could be it.

Is there an adjustment to the shift linkage I can make?

 

I've had my share of problems with hydraulic clutches, and what you describe sounds like some air is in the system some place.
The way I bleed a hyd clutch is from the bottom, by using a pump type oil can w/ brake oil, with a hose on it to fit the bleeder fitting on the slave cylinder. Remove cap on reservoir... Pushing oil up from the bottom pushes the air up ahead of it. Pump it until it overflows the reservoir... It works for me.

 

Doesn't the fluid corrode everything it touches?

In any case, I punted for lack of time, and the shop that put in a new master cylinder a year ago said it was leaking and is replacing it for free. So you are right, there was air or otherwise an inability to keep pressure.

 

I have a 90 Cherokee with hydraulic slave that took out 4 master cyls before I broke down and got the whole clutch kit warranteed. The hydraulic slave was not releasing and would blow the cap off the master.
Now I can't seem to get the air out completely. Again. I've pressure bled from the master, foot bled, gravity bled, and it still grinds going into reverse and pedal is almost to floor before releasing.
I will try the oil can trick, or maybe rig my pressure bleeder to force fluid/air UP through the system.
Great idea!
Thanks!