Clutch fork?

[Ironhead Dave]

I have a friend with a 98 Sidekick JX that about every 3-5 days needs the clutch adjusted. I will adjust the cable to get the right amount of play and it will shift great and it slowly will shift harder until the clutch no longer disengages at all. I am almost out of adjustment on the cable without having to move the arm. I realize that this is the wrong fix and there is a bigger issue but I don't want to just throw parts at it without some direction. I have checked the pedal, bushings, welds, and firewall. Everything appears fine there. I noticed where the cable hooks to the pedal that it acts like he pedal is slotted. It will move about an inch before it even starts to pull the cable. That translates to a lot more at the pedal itself. I also have measured from the bracket on the engine to the arm on the clutch to see if that distance changes at all showing the cable stretching. It does not change and I really can't notice any play in the cable either. However, if I turn the adjuster about 4-6 'clicks' (half turns) it will drive fine again. I have heard that the clutch fork is a weak point but I would think that it would have failed by now.

Any suggestions?

Thanks.
Dave