S-10 2002 the clutch pedal sometimes goes all the way down and its hard to shift but then it goes back to normal like if nothing was wrong with the clutch . is there an adjustment i can make on it.

check that you have fluid in the master reservoir. Bleed air from the clutch system.

The clutch hydraulic system has a problem-either the clutch master cylinder or the slave cylinder on the bell housing may be at fault.

If the brake fluid is low in the clutch master cylinder reservoir, there may be a leak to the outside. Refill and check for leaks while someone pumps the clutch pedal. Check around the clutch master cylinder (also under the dash- if wet there around the top of the clutch pedal or if wet on the carpet below the pedal, the master cylinder is leaking.) Check the single line from the clutch master to the bell housing where the slave cylinder is. If no leaks found, likely the clutch master cylinder or the slave cylinder has failed internally.

Is it safe: there won't be any further damage caused by running it, but if shifting gets harder and harder to do, that may cause a driveability problem.

You have air in the clutch system. Check the fluid level in the reservoir . Check for oil leaks at the slave cylinder ( replace if there is oil ) Have the system bled . IF you have fluid and the air comes back then replace the clutch master cylinder as the air will be bypassing the piston cup from blockages in the ports.

Hi Amiralred, I believe the problem is to be found with the clutch plate and most likely to do with a defective center boss. When it is removed I believe you will find that one or more of the torque absorption spring has broken and possibly the center boss. A good idea with clutch plates, is to use original replacement parts if possible. Regards John

You have one of these two things going on....Either the clutch master cylinder is internally bypassing or the clutch itself has gone bad. If you can pump the clutch and sometimes be able to shift, the master is bad. If the clutch pedal feels normal, then I'd suspect the actual clutch disc is worn out.
Your clutch has little to do with shifting with the engine off as nothing is turning and engaging the gears is not a problem. Have an experienced tech take a look at it if in doubt ...should take all of five minutes to determine what's wrong.

The clutch is not fully releasing. You can try putting it into some other gear first, then rapidly moving to first gear, but really, you need to either adjust the clutch, or get it repaired.

Provided the mechanical portion of our clutch is good then you still have some air somewhere in the hydraulic system and it's often very hard to get out. One trick I use is to use my hand vacuum pump with a little cover I made to cover the fill hole on top of the master cylinder. I pump up about 15" of vacuum on the system and often that will pull out the few air bubbles submerged in the fluid that prevent the system from working. Once you get most of the air out usually the rest will work out if you press and release the clutch pedal several times. Sometimes it works very quickly, sometimes I've fought them for an hour or more to get back to a normal pedal. Of course if you have an actual mechancial problem inside the bellhousing with the pressure plate or disc then nothing you do on the outside will work until that is repaired.

This depends as dose it do it when cold or hot.
2nd when you push in pedal and put in gear dose it go in clean or hard to select 3rd can you hear a grinding noise when pushing in pedal and noise goes
when you take you foot off the clutch pedal IF so then its the thrust bearing on clutch REPLACE ALL .4th if you push in clutch pedal and select a gear and let the clutch out if drive right out (replace)

2003 hyundai, should only have hyundai approved fluids in both the cooling system and transmission. If you take your vehicle to a transmission shop other that hyundai let them now there is a special fluid that goes back into the either radiator or transmission. Regular transmission fluids viscosity is to thick and will make shifting very hard. My Mazda has the same issues Wrong fluids go back into the transmission when I have had work done to it making the shifter hard to shift in cold weather. A Worn clutch can have the same effect.

I found that having a wood stick on the clutch pedal down to the floor all night (the other end of the stick held by the seat. oh yeah !!! ) would help to ease shifting for the first hour the next morning, then it would come back stiff and hard to engage in gear.