When clutch pushed in it makes high pitched squeel

I have an 05 6 cylinder automatic TJ. The other morning I was getting trouble codes U0101 and P1603. For a few seconds the Jeep was shaking and for the entire 30min ride it wouldn't shift into the last gear, it would just continue to rev. The next day I drove it and it was fine. I also noticed a slight high pitch whine noise coming from the engine at low speeds. Any suggestions? Thanks!

Does it do it if you disconnect the idle air control valve ?
You need to know if its a vac leak or if the computer is making the valve open too far.

that sounds like a throw out bearing failure-is there any adjustment at the slave cylinder-it may be holding the bearing against the clutch and causing the noise-this thread may help-http://www.jeepforum.com/forum/f9/how-change-bleed-clutch-slave-cylinder-511531/- cheers Denny

Check the clutch fluid level. If it's low, add some (takes brake fluid). There is a bleed valve down on the clutch slave cylinder on the bellhousing. Open the bleed valve and have someone push the clutch pedal slowly to floor, and hold. Close the bleed valve, and repeat until fluid comes out in a steady stream when the pedal is depressed. Your pedal should have pressure now, and the clutch should be working.
If no fluid is forced out the clutch master cylinder, into the line, and to the slave cylinder when clutch is pressed, then you may have a bad clutch master cylinder. If fluid does come out the bleed valve, but still no pressure on the pedal, it may be a bad slave cylinder.
Post back for more. Would like to know what you find out, and what the problem was, OB. Good luck.

you need to replce the cluch and preasure plate. the clutch is gone, its hard to shift because there is nothing left to pushout on the plate and the squeeling is from the same problem, the clutch works like brakes, when the pads are gone and you step on brake you get asqeeling sound from it being metal to metal the same thing is happening with your clutch

If the pilot bearing was the problem it would make noise with the clutch pushed and go away when you let it out. Have you checked the fluid level in the transmission?

easy #1 check is what gear is hard when running turn car off it goes in easy probably just a clutch adj. or problem. gone unfixed can destroy the trans synchronizers

Likely, you have a hydraulic clutch system. Check clutch master cylijnder for fluid and leakage, check hydraulic line and slave cylinder for leaks. If fluid low or empty, bleed as you would a brake wheel cylinder. If full,have someone work the clutch while you watch slave cylinder to make sure it is moving clutch fork. If system full and little or no movement, the master may be "bypassing" internally (replace) Also, check pedal mechanical linkage. Not often but sometimes these parts can break! Could also be athat clutch itself is worn, but this does not happen overnight and you would have noted slip long before this!

Jeep #1: Sounds like a shift linkage problem. Possibly synchro forks are sliding back and forth on shift rails and are out of adjustment. This is internal and cannot readily be fixed without trans removal as far as I know. Hydraulic clutch system is non-adjustable. A new clutch should last at least 70K so, unless it was installed improperly, it should be OK. Check hydraulics for leaks & bleed. Clutch should "catch" about two inches off floor (not too low or not too near top of travel)
Jeep#2: Has a synchro or other internal gear problem... Symptoms are similar but gringing and clicking noises indicate worn or broken internal components!
Good luck to both!

there is a switch on the clutch linkage. you can see it if you look under the pedol it looks like a black cylinder that slides along the clutch shaft. when this breaks you can't start you Jeep.
Mine broke I had to wait 2 weeks for a replacement part.
oh yeah( it clicks when you press the clutch) so you know it is broken.