A few questions:
gud day sir salamat po sa reply :D
1. Does the clutch pedal feel normal or spongy or stiff siya or low on the floor?
2. Kapag matagal lang na biyahe saka lang mahirap mag-shift to 1st and Reverse gear from stationary position, pero madali mag-shift up to 2nd, 3rd, 4th, 5th gear when in motion?
3. Kapag pinatay mo makina at lumamig na, tapos paandarin mo ulit, madali lang mag-shift to 1st and Reverse gear early on pero mahirap ulit after some time like after 1 hour of driving?
Kung symptom mo ay number 1, baka sa may clutch linkage lang, easier to remedy, check clutch fluid if leaking or low, etc.
Iyong symptom 2 and 3, na-experience ko na sa 2002 Revo SR namin nung 8yrs old/80k mileage na siya. Clutch disc was worn. I had the clutch disc replaced, flywheel resurfaced, etc. Other possible causes for those symptoms ay issue with the pressure plate, worn clutch release bearing, etc, basta within the clutch assembly na mismo.
You can try the following check:
Here's a good list of clutch troubleshooting checks:
Troubleshooting - Clutch
Still better to have a mechanic check it if it's just as simple as clutch linkage, fluid level/bleeding, master/slave cylinder issue. But if it's the actual clutch, it may be best to replace. If you have a worn clutch disc or something else gives inside the clutch assembly, it could cause more damage and higher repair/replace costs.