98 Pathfinder developing clutch problems

it new six years ago. But a few months ago, the clutch started making a screeching noise when I disengaged. This was only happening during the first few minutes after the truck was started. But now, the noise is lasting longer and longer and I'm afraid it might be the throw out bearing. Any suggestions out there is to other possibilities and should I have the clutch and pressure plates replaced at the same time if it is the throw out bearing. How about getting the fly wheel turned? Thanks for any help...

Beyond a doubt all wear items should be changed while you (or whoever) is in there as 95% of the work is getting to it. The flywheel should be fine if it's not slipping yet.

It's the pilot bushing. For some reason nissan thinks the "oil lite" type bushing will last without any lube in that environment. Some mechanics don't lube them when they install new ones and this noise returns. I've had customers who drive in town a lot go though this once a year until someone installs one and greases it. Anyway unless the clutch was done recently, you should replace everything (use a nissan clutch, they aren't that expencive) but make SURE they replace the pilot bushing and lube it with some grease before they install the new clutch.